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Toshiba MML-AP0074H2UL Service Manual

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SERVICE MANUAL
AIR-CONDITIONER
<Floor Console Exposed Type>
MML-AP0074H2UL
MML-AP0094H2UL
MML-AP0124H2UL
MML-AP0154H2UL
MML-AP0184H2UL
MML-AP0244H2UL
FILE No. A10-1602
Revision 1 : Jun., 2016
Revision 2 : Jun., 2017
(MULTI TYPE)
<Floor Console Recessed Type>
MML-AP0074BH2UL
MML-AP0094BH2UL
MML-AP0124BH2UL
MML-AP0154BH2UL
MML-AP0184BH2UL
MML-AP0244BH2UL
PRINTED IN JAPAN, Mar., 2016, TOMO

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  • Page 1 All manuals and user guides at all-guides.com FILE No. A10-1602 Revision 1 : Jun., 2016 Revision 2 : Jun., 2017 SERVICE MANUAL AIR-CONDITIONER (MULTI TYPE) <Floor Console Exposed Type> <Floor Console Recessed Type> MML-AP0074H2UL MML-AP0074BH2UL MML-AP0094H2UL MML-AP0094BH2UL MML-AP0124H2UL MML-AP0124BH2UL MML-AP0154H2UL MML-AP0154BH2UL MML-AP0184H2UL...

  • Page 2: Table Of Contents

    All manuals and user guides at all-guides.com CONTENTS SAFETY CAUTION ..............3 1. SPECIFICATIONS ..............8 2. CONSTRUCTION VIEWS (EXTERNAL VIEWS)....10 3. WIRING DIAGRAM ............16 4. PARTS RATING ..............18 5. REFRIGERATING CYCLE DIAGRAM ......19 6. CONTROL OUTLINE ............20 7. APPLIED CONTROL AND FUNCTION ......26 8.

  • Page 3: Safety Caution

    All manuals and user guides at all-guides.com SAFETY CAUTION The important contents concerned to the safety are described on the product itself and on this Service Manual. Please read this Service Manual and understand the described items thoroughly in the following contents (Indications/Illustrated marks), and keep the manual for reference.
  • Page 4 All manuals and user guides at all-guides.com WARNING Before troubleshooting or repair work, check the ground wire is connected to the ground terminals of the main unit, otherwise an electric shock is caused when a leak occurs. If the ground wire is not correctly connected, contact an electrician for rework. Check ground wires.
  • Page 5 All manuals and user guides at all-guides.com WARNING After the work has finished, be sure to use an insulation tester set (500V Megger) to check the resistance is 2M or more between the charge section and the non-charge metal section (Ground position). If the resistance value is low, a disaster such as a leak or electric shock is caused at user’s Insulator check side.
  • Page 6 All manuals and user guides at all-guides.com • Refrigerant (R410A) This air conditioner adopts a HFC type refrigerant (R410A) which does not deplete the ozone layer. 1. Safety Caution Concerned to Refrigerant (R410A) The pressure of R410A is high 1.6 times of that of the previous refrigerant (R22). Accompanied with change of refrigerant, the refrigerating oil has been also changed.
  • Page 7 All manuals and user guides at all-guides.com 4. Tools 1. Required Tools for R410A Mixing of different types of oil may cause a trouble such as generation of sludge, clogging of capillary, etc. Accordingly, the tools to be used are classified into the following three types. 1) Tools exclusive for R410A (Those which cannot be used for conventional refrigerant (R22)) 2) Tools exclusive for R410A, but can be also used for conventional refrigerant (R22) 3) Tools commonly used for R410A and for conventional refrigerant (R22)

  • Page 8: Specifications

    All manuals and user guides at all-guides.com 1. SPECIFICATIONS 1-1. Floor console exposed Type Model name MML- AP0074H2UL AP0094H2UL AP0124H2UL AP0154H2UL Cooling capacity kBtu/h 12.0 15.4 Heating Capacity kBtu/h 10.5 13.5 17.0 Electrical Power supply 230V(208V/230V) 1phase 60Hz charastaristics Power consumption 208V 0.049 0.049...
  • Page 9 All manuals and user guides at all-guides.com 1-2. Floor console recessed Type Model name MML- AP0074BH2UL AP0094BH2UL AP0124BH2UL AP0154BH2UL Cooling capacity kBtu/h 12.0 15.4 Heating Capacity kBtu/h 10.5 13.5 17.0 Electrical Power supply 230V(208V/230V) 1phase 60Hz charastaristics Power consumption 208V 0.047 0.047 0.047...

  • Page 10: Construction Views (External Views)

    All manuals and user guides at all-guides.com 2. CONSTRUCTION VIEWS (EXTERNAL VIEWS) 2-1. Floor Console Exposed Type MML-AP0074H2UL, AP0094H2UL, AP0124H2UL Unit : in (mm) – 10 –...
  • Page 11 All manuals and user guides at all-guides.com MML-AP0154H2UL, AP0184H2UL Unit : in (mm) – 11 –...
  • Page 12 All manuals and user guides at all-guides.com MML-AP0244H2UL Unit : in (mm) – 12 –...
  • Page 13 All manuals and user guides at all-guides.com 2-2. Floor Console Recessed Type MML-AP0074BH2UL, AP0094BH2UL, AP0124BH2UL Unit : in (mm) – 13 –...
  • Page 14 All manuals and user guides at all-guides.com MML-AP0154BH2UL, AP0184BH2UL Unit : in (mm) – 14 –...
  • Page 15 All manuals and user guides at all-guides.com MML-AP0244BH2UL Unit : in (mm) – 15 –...

  • Page 16: Wiring Diagram

    All manuals and user guides at all-guides.com 3. WIRING DIAGRAM 3-1. Floor Console Exposed Type MML-AP0074H2UL, AP0094H2UL, AP0124H2UL, AP0154H2UL, AP0184H2UL, AP0244H2UL – 16 –...
  • Page 17 All manuals and user guides at all-guides.com 3-2. Floor Console Recessed Type MML-AP0074BH2UL, AP0094BH2UL, AP0124BH2UL, AP0154BH2UL, AP0184BH2UL, AP0244BH2UL – 17 –...

  • Page 18: Parts Rating

    All manuals and user guides at all-guides.com 4. PARTS RATING Floor Console Exposed Type Model MML-AP 0074H 0094H 0124H 0154H 0184H 0244H SWA-200U19A4A AF-200-45-4FU AF-200-70-4KU Running condenser for fan motor AC450 V, 1.5 μF AC450 V, 2 μF AC400 V, 2.5 μF TT12 EDM-MD12TF-3 EDM-B25YGTF...

  • Page 19: Refrigerating Cycle Diagram

    All manuals and user guides at all-guides.com 5. REFRIGERATING CYCLE DIAGRAM Liquid side Gas side Strainer Capillary tube Air heat exchanger at indoor side Pulse Motor Valve (PMV) Strainer Sensor (TCJ) Sensor (TC2) Sensor (TC1) Sensor Fan motor (TA) Functional part name Functional outline Pulse Motor Valve (Connector CN082 (6P): Blue)

  • Page 20: Control Outline

    All manuals and user guides at all-guides.com 6. CONTROL OUTLINE Item Outline of specifications Remarks When power 1) Distinction of outdoor unit supply is reset When the power supply is reset, the outdoors are distinguished and the control is selected according to the distinguished result.
  • Page 21 All manuals and user guides at all-guides.com Item Outline of specifications Remarks Automatic 1) Based on the difference between TA and TS, the capacity control operation capacity is determined by the outdoor unit. COOL HEAT ˚F (˚C) ˚F (˚C) +3.6 (+2) +1.8 (+1) +1.8 (+1) TS: Setup temp.
  • Page 22 All manuals and user guides at all-guides.com Item Outline of specifications Remarks Fan speed <HEAT> selection (Continued) TA ˚F (˚C) L <L> (– 0.9) – 1.8 [(– 0.5) – 1.0] L <H> (0) Tsh H <H> (+0.9) +1.8 [(+0.5) +1.0] <HH>...
  • Page 23 All manuals and user guides at all-guides.com Item Outline of specifications Remarks Freeze prevention 1. In all cooling operation, the air conditioner operates control as described below based upon temp.detected by (Low temp. release) TC1, TC2 and TCJ sensors. • When “J” zone is detected for 5 minutes, the thermostat is forced to turn off.
  • Page 24 All manuals and user guides at all-guides.com Item Outline of specifications Remarks Recovery control The indoor unit which is in STOP/Thermostat-OFF • The indoor unit which is for heating status or which operates in [FAN] mode performs the under thermostat-OFF refrigerant (Oil) following controls when it receives the heating (COOL) status or which...
  • Page 25 All manuals and user guides at all-guides.com Item Outline of specifications Remarks Display of < READY> Displayed on the remote control • <READY > display [READY] 1) When the following check codes are indicated No display for wireless [HEAT READY] type remote control •...

  • Page 26: Applied Control And Function

    All manuals and user guides at all-guides.com 7. APPLIED CONTROL AND FUNCTION 7-1. Indoor Control Block Diagram 7-1-1. When Main (Simple) Wired Remote Control Connected – 26 –...
  • Page 27 All manuals and user guides at all-guides.com 7-1-2. When Wireless Remote Controlr Kit Connected – 27 –...
  • Page 28 All manuals and user guides at all-guides.com 7-1-3. When Both Wired (Simple) Remote Control and Wireless Remote Control Kit Connected – 28 –...
  • Page 29 All manuals and user guides at all-guides.com 7-1-4. Indoor Printed Circuit Board MCC-1403 – 29 –...
  • Page 30 All manuals and user guides at all-guides.com P.C. Board Optional Switch/Connector Specifications Connector Function Specifications Remarks Start / stop input for HA (J01: In place / Removed = Start / stop input Pulse input (factory default) / Step input) 0 V (COM) Remote control disabling input Enables / disables start / stop control via remote control CN061...
  • Page 31 All manuals and user guides at all-guides.com 7-2. Functions at test run Cooling/Heating test run check The test run for cooling/heating can be performed from either indoor remote control or outdoor interface P.C. board. 1. Start/Finish operation of test run Test run from indoor remote control Wired remote control: Refer to the below item of “Test run”...
  • Page 32 All manuals and user guides at all-guides.com <In case of wireless remote control (TCB-AX32-UL)> 1. When TEMPORARY button is pushed for 10 seconds or more, Pi!” sound is heard and the operation changes to a forced cooling operation. After approx. 3 minutes, a cooling operation is forced to start. Check if cool air starts blowing.
  • Page 33 All manuals and user guides at all-guides.com 7-3. Method to Set Indoor Unit Function DN Code (When performing this task, be sure to use a wired remote control) <Procedure> To be performed only when system at rest Push the buttons simultaneously and hold for at least 4 seconds.
  • Page 34 All manuals and user guides at all-guides.com Function CODE No. (DN Code) Table (Includes All Functions Needed to Perform Applied Control on Site) Item Description At shipment Filter display delay timer 0000: None 0001: 150H According to type 0002: 2500H 0003: 5000H 0004: 10000H 02 Dirty state of filter...
  • Page 35 All manuals and user guides at all-guides.com 7-4. Applied Control in Indoor Unit Remote location ON/OFF control box (TCB-IFCB-4UL) [Wiring and setup] • Use the exclusive connector for connection with the indoor control P.C. board. • In a group control, the system can operate when connecting with any indoor unit (Control P.C. board) in the group.
  • Page 36 All manuals and user guides at all-guides.com Ventilating fan control from remote control [Function] • The start/stop operation can be operated from the wired remote control when air to air heat exchanger or ventilating fan is installed in the system. •...
  • Page 37 All manuals and user guides at all-guides.com Leaving-ON prevention control [Function] • This function controls the indoor units individually. It is connected with cable to the control P.C. board of the indoor unit. • In a group control, it is connected with cable to the indoor unit (Control P.C. board), and the CODE No. is set to the connected indoor unit.
  • Page 38 All manuals and user guides at all-guides.com Address setup (Manual setting from Wired remote control) In case that addresses of the indoor units will be determined prior to piping work after wiring work • Set an indoor unit per a remote control. •...
  • Page 39 All manuals and user guides at all-guides.com Confirmation of indoor unit No. position 1. To know the indoor unit addresses though position of the indoor unit is recognized • In case of individual operation (Wired remote control : indoor unit = 1 : 1) (Follow to the procedure during operation) <Procedure>...
  • Page 40 All manuals and user guides at all-guides.com How to check all the unit No. from an arbitrary wired remote control <Procedure> Carry out this procedure when the system is turned off. The indoor unit No. and the position in the identical refrigerant piping can be checked. An outdoor unit is selected, the identical refrigerant piping and the indoor unit No.
  • Page 41 All manuals and user guides at all-guides.com How to change an indoor unit address by using a wired remote control Use this method to change the address of indoor units (one to one or group control) that have had the original address set automatically.
  • Page 42 All manuals and user guides at all-guides.com How to change all indoor addresses from an arbitrary wired remote control (It is possible when setting has finished by automatic addresses.) Contents: The indoor unit addresses in each identical refrigerant piping line can be changed from an arbitrary wired remote control.
  • Page 43 All manuals and user guides at all-guides.com Function to clear the check code 1. Clearing method from remote control How to clear the check code of outdoor unit The currently detected check code of the outdoor unit is cleared by using the service monitor function of the remote control.
  • Page 44 All manuals and user guides at all-guides.com Monitoring function of remote control switch When using the remote control (Model Name: RBC-AMT32UL), the following monitoring function can be utilized. Calling of display <Contents> The temperature of each sensor of the remote control, indoor unit and outdoor unit and the operating status can be checked by calling the service monitor mode from the remote control.
  • Page 45 All manuals and user guides at all-guides.com < Based on the SMMS-e > CODE No. Data name Display format Unit Remote control display example Room temperature (Use to control) ×1 °C [0027] = 27 °C Room temperature (Remote control) ×1 °C Indoor suction air temperature (TA) ×1...
  • Page 46 All manuals and user guides at all-guides.com Changing of settings for Celsius display • Push ON / OFF button if the unit stops. Procedure 1 Push simultaneously buttons for 4 seconds or more. After a while, the display part flashes as shown right. Check the displayed CODE No. is [ •...

  • Page 47: Troubleshooting

    All manuals and user guides at all-guides.com 8. TROUBLESHOOTING 8-1. Overview (1) Before engaging in troubleshooting (a) Applicable models All Super Module Multi (SMMS-i, SMMS-e) models. (Indoor units: MM ∗ ∗∗∗ , Outdoor units: MMY-MAP ∗∗∗ (b) Tools and measuring devices required •...
  • Page 48 All manuals and user guides at all-guides.com 8-2. Troubleshooting Method The remote controls (main remote control and central control remote control) and the interface P.C. board of an outdoor unit are provided with an LCD display (remote control) or a 7-segment display (outdoor interface P.C. board) to display operational status.
  • Page 49 All manuals and user guides at all-guides.com (Trouble detected by main remote control) Check code Display of receiving unit Outdoor 7-segment display Indicator light block Typical fault site Description of trouble Main remote control Operation Timer Ready Sub-code Flash No master remote control, Signals cannot be received from indoor unit;...
  • Page 50 All manuals and user guides at all-guides.com List of Check Codes (Outdoor Unit) (Check code detected by SMMS-e outdoor interface - typical examples) If “HELLO” is displayed on the oudoor 7-segment for 1 minute or more, turn off the power supply once and then turn on the power supply again after 30 seconds or more.
  • Page 51 All manuals and user guides at all-guides.com Check code Display of receiving unit Outdoor 7-segment display TCC-LINK Indicator light block Typical problem site Description of problem central control or main remote Operation Timer Ready Sub-code control Flash display Outdoor heat exchanger Outdoor heat exchanger gas side temperature 01: TG1 gas side temperature...
  • Page 52 All manuals and user guides at all-guides.com Check code Display of receiving unit Outdoor 7-segment display TCC-LINK Indicator light block Typical problem site Description of problem central control or main remote Operation Timer Ready Sub-code control Flash display A3-IPDU Fan-IPDU A3-IPDU Fan-IPDU There are insufficient number of IPDUs (P.C.
  • Page 53 All manuals and user guides at all-guides.com (Check code detected by IPDU featuring in SMMS-e standard outdoor unit - typical examples) Check code Display of receiving unit Outdoor 7-segment display TCC-LINK Indicator light block central control Typical problem site Description of proplem or main remote Operation Timer Ready Sub-code...
  • Page 54 All manuals and user guides at all-guides.com 8-3. Troubleshooting Based on Information Displayed on Remote Control Using main remote control (RBC-AMT32UL) (1) Checking and testing When a fault occurs to an air conditioner, a check code and indoor unit No. are displayed on the display window of the remote control.
  • Page 55 All manuals and user guides at all-guides.com Using indoor unit indicators (receiving unit light block) (wireless type) To identify the check code, check the 7-segment display on the header unit. To check for check codes not displayed on the 7-segment display, consult the “List of Check Codes (Indoor Unit)” in “8-2. Troubleshooting Method”. : Goes off : Lighting : Blinking (0.5 seconds)
  • Page 56 All manuals and user guides at all-guides.com Heat exchanger temperature sensor (TCJ) trouble Operation Timer Ready Heat exchanger temperature sensor (TC2) trouble Indoor unit temperature sensor Heat exchanger temperature sensor (TC1) trouble troubles Ambient temperature sensor (TA/TSA) trouble Alternate blinking Discharge temperature sensor (TF) trouble Discharge temperature sensor (TD1) trouble Operation Timer...
  • Page 57 All manuals and user guides at all-guides.com Light block Check code Cause of fault Operation Timer Ready Outdoor EEPROM trouble Synchronized blinking Other (indications not involving check code) Light block Check code Cause of fault Operation Timer Ready – Test run in progress Synchronized blinking Operation Timer Ready...
  • Page 58 All manuals and user guides at all-guides.com 8-4. Check Codes Displayed on Remote Control and SMMS-e Outdoor Unit (7-Segment Display on I/F Board) and Locations to Be Checked For other types of outdoor units, refer to their own service manuals. Check code Location Trouble detection...
  • Page 59 All manuals and user guides at all-guides.com Check code Location Trouble detection Main Outdoor 7-segment display Description System status Check items (locations) condition(s) remote detection Check Sub-code control code Too many All stop • Combined capacity of indoor units • Check capacities of indoor units Overloading indoor units exceeds 135% of combined...
  • Page 60 All manuals and user guides at all-guides.com Check code Location Trouble detection Main Outdoor 7-segment display Description System status Check items (locations) condition(s) remote detection Check Sub-code control code IPDU All stop Communication is disrupted • Check wiring and connectors A3-IPDU Fan-IPDU communication...
  • Page 61 All manuals and user guides at all-guides.com Check code Location Trouble detection Main Outdoor 7-segment display Description System status Check items (locations) condition(s) remote detection Check Sub-code control code 01: TS1 sersor trouble TS1/TS2 All stop Sensor resistance is infinity or zero •...
  • Page 62 All manuals and user guides at all-guides.com Check code Location Trouble detection Main Outdoor 7-segment display Description System status Check items (locations) condition(s) remote detection Check Sub-code control code Activation of All stop Low-pressure Ps sensor detects • Check service valves to confirm low-pressure operating pressure lower than full opening (both gas and liquid...
  • Page 63 All manuals and user guides at all-guides.com Check code Location Trouble detection Main Outdoor 7-segment display Description System status Check items (locations) condition(s) remote detection Check Sub-code control code 01: TK1 oil circuit trouble Oil level All stop No temperature change is detected •...
  • Page 64 All manuals and user guides at all-guides.com Check code Location Trouble detection Main Outdoor 7-segment display Description System status Check items (locations) condition(s) remote detection Check Sub-code control code Indoor Indoor capacity Stop of Capacity setting has not been Set indoor capacity. (DN = 11) —...
  • Page 65 All manuals and user guides at all-guides.com Check code Location Trouble detection Main Outdoor 7-segment display Description System status Check items (locations) condition(s) remote detection Check Sub-code control code 01: Compressor 1 side IPDU Activation of All stop High-pressure SW is activated. •...
  • Page 66 All manuals and user guides at all-guides.com Check code Location Trouble detection Main Outdoor 7-segment display Description System status Check items (locations) condition(s) remote detection Check Sub-code control code 01: TS condition All stop Protective shutdown due to • Check for insufficiency in leakdetection sustained suction temperature at or refrigerant quantity.
  • Page 67 All manuals and user guides at all-guides.com Check code Location Trouble detection Main Outdoor 7-segment display Description System status Check items (locations) condition(s) remote detection Check Sub-code control code #0:Element short circuit IPDU Outdoor fan All stop (Sub code: #0) •...
  • Page 68 All manuals and user guides at all-guides.com 8-5. Sensor Characteristics Indoor Unit Temperature sensor characteristics Temperature Resistance [˚F (˚C)] [k ] Resistance 32 (0) 33.9 [k ] 41 (5) 26.1 50 (10) 20.3 59 (15) 15.9 68 (20) 12.6 77 (25) 10.0 86 (30) 95 (35)

  • Page 69: Detachments

    All manuals and user guides at all-guides.com 9. DETACHMENTS 9-1. Floor Console Exposed Type WARNING CAUTION Be sure to turn off the power supply and the breaker Be sure to put on the gloves at disassembling work; and then start a work. otherwise an injury will be caused by a part, etc.
  • Page 70 All manuals and user guides at all-guides.com Spare parts Work procedure Remarks Refrigerant 1. Detachment cycle (1) Recover the refrigerant gas. assembly (2) Take off the connecting pipe. (Liquid pipe and gas pipe) (3) Following to works 1 of , and (1) to (10), detach the parts.
  • Page 71 All manuals and user guides at all-guides.com Spare parts Work procedure Remarks M4 screw Fan assembly 1. Detachment (1) Following step 1 of , (1) to (3), (6 )and (7), detach the parts. (2) Take off the nut which fixes the fan assembly. (M6 nut: 1 position) (3) Draw out the fan assembly toward you.
  • Page 72 All manuals and user guides at all-guides.com Spare parts Work procedure Remarks Capacitor 1. Detachment (1) Following step 1 of and (1) to (2), detach the parts. (2) Remove the capacitor. (M4 screw: 1 position) 2. Attachment Following step 1 of , and (1) to (3), attach the parts as original in the reverse procedure.
  • Page 73 All manuals and user guides at all-guides.com 9-2. Floor Console Recessed Type WARNING CAUTION Be sure to turn off the power supply and the breaker Be sure to put on the gloves at disassembling work; and then start a work. otherwise an injury will be caused by a part etc.
  • Page 74 All manuals and user guides at all-guides.com Spare parts Work procedure Remarks Refrigerating 1. Detachment cycle (1) Recover the refrigerating gas. assembly (2) Remove the connecting pipes. (Liquid pipe and gas pipe) (3) Following to works in 1 of and (1) to (7), detach the parts.
  • Page 75 All manuals and user guides at all-guides.com Spare parts Work procedure Remarks PMV motor 1. Detachment PMV motor (1) Following to the works in 1 of and (3) to (9), detach the parts. (2) Peel butyl rubber which is adhered to the PMV body, loosen the nut fixing the PMV motor with a double spanner, and then remove the PMV motor.
  • Page 76 All manuals and user guides at all-guides.com Spare parts Work procedure Remarks Fan motor [AP007 to 012] 1. Detachment (1) Following to works of 1 of and (1) to (3), detach the parts. (2) Cut off the fixing band which fixes the fan motor lead. (Two positions) (3) Cut off the fixing band fixes the lead cover and the fan motor lead, and then remove the lead cover...
  • Page 77 All manuals and user guides at all-guides.com Spare parts Work procedure Remarks Fan motor 2. Attachment (Continued) Following to works of 1 of and (1) to (5), attach the parts as original in the reverse procedure. * When attaching the fan motor, be sure that the fan motor does not hit the motor base reinforcement plate.
  • Page 78 All manuals and user guides at all-guides.com Spare parts Work procedure Remarks Fan motor [AP015 to 024] (Continued) 1. Detachment (1) Following to works of 1 of and (1) to (3), detach the parts. (2) Cut off the fixing band which fixes the fan motor lead. (Two positions) (3) Cut off the fixing band fixes the lead cover and the fan motor lead, and then remove the lead cover...
  • Page 79 All manuals and user guides at all-guides.com Spare parts Work procedure Remarks Fan motor 2. Attachment (Continued) Following to works of 1 of and (1) to (8), attach the parts as original in the reverse procedure. * When attaching the fan motor reinforcement plate, be sure that the fan motor reinforcement plate is not caught in the motor band.
  • Page 80 All manuals and user guides at all-guides.com Spare parts Work procedure Remarks Capacitor [AP007 to 012] 1. Detachment (1) Following to ‚1 of , and (1) to (3), detach the parts. (2) Remove the capacitor cover and remove the Capacitor capacitor lead from the capacitor.

  • Page 81: Board Exchange Procedures

    All manuals and user guides at all-guides.com 10. P.C. BOARD EXCHANGE PROCEDURES Indoor unit 10-1.Replacement of indoor P.C. boards Part code Model type P.C. board type 431-6V-586 MML-AP BH2UL MCC-1403 431-6V-587 MML-AP H2UL MCC-1403 Points to note when replacing indoor P.C. board assembly The electrically erasable programmable read-only memory (hereinafter EEPROM, IC10) mounted on an indoor P.C.
  • Page 82 All manuals and user guides at all-guides.com Method 2 If it is not possible to turn on the indoor unit or read the setting data from the P.C. board to be replaced via a wired remote control or operate the remote control due to the failure of its power supply circuit - Replacing EEPROM (IC10) (For the location of this component and the method to replace it, see the “EEPROM location diagram”...
  • Page 83 All manuals and user guides at all-guides.com Procedure 1: reading setting data from EEPROM (Read the setting data from EEPROM, including both the factory settings and any modifications made to them on site.) Push the buttons simultaneously and hold for at least 4 seconds. (This number corresponds to the same number shown on the Remote Control Operation Diagram.) * In the case of group control, the unit No.
  • Page 84 All manuals and user guides at all-guides.com Procedure 2: replacing P.C. board Replace the faulty P.C. board with a service P.C. board. Be sure to replicate the old jumper setting (removal), and connector short-circuit setting (e.g. CN030) on the service P.C. board. (See the diagram at below.) CN041 (MCC-1403) CN030...
  • Page 85 All manuals and user guides at all-guides.com Procedure 3: writing setting data in EEPROM (The EEPROM of the service P.C. board has been set to the factory default values.) Push the buttons simultaneously and <Fig. 1 RBC-AMT32UL> hold for at least 4 seconds. (This number corresponds to the same number shown on the Remote Control Operation Diagram.) (Under UNIT No., ALL is displayed.)
  • Page 86 All manuals and user guides at all-guides.com EEPROM location diagram The EEPROM (IC10) is mounted on an IC socket. Use a pair of tweezers, etc. to remove it. When installing it, adjust its orientation as shown in the diagram below. During EEPROM removal / installation, take care not to bend IC leads.

  • Page 87: Exploded Views And Parts List

    All manuals and user guides at all-guides.com 11. EXPLODED VIEWS AND PARTS LIST 11-1. Floor Console Exposed Type MML- AP0074H2UL, AP0094H2UL, AP0124H2UL, AP0154H2UL, AP0184H2UL, AP0244H2UL – 87 –...
  • Page 88 All manuals and user guides at all-guides.com Q'ty/Set MML-AP Location Part No. Description 0074 0094 0124 0154 0184 0244 H2UL H2UL H2UL H2UL H2UL H2UL 43723020 CASE, FAN, LEFT 43723019 CASE, FAN, RIGHT 43126119 CASE, FAN, RIGHT 43109394 GRILL,INLET,WHITE 43166026 REMOTE CONTROLLER, SIMPLE, SX-U01EQ 43166013 REMOTE CONTROLLER, SX-TA01UE...
  • Page 89 All manuals and user guides at all-guides.com Electrical parts Q'ty/Set MML-AP Location Part No. Description 0074 0094 0124 0154 0184 0244 H2UL H2UL H2UL H2UL H2UL H2UL 43050425 SENSOR ASSY, SERVICE, TC (F6) : TC2, TCJ 43F50426 SENSOR, SERVICE, TA 43150320 SENSOR ASSY, SERVICE, TG (F4) : TC1 43158182...
  • Page 90 All manuals and user guides at all-guides.com 11-2. Floor Console Recessed Type MML-AP0074BH2UL, AP0094BH2UL, AP0124BH2UL – 90 –...
  • Page 91 All manuals and user guides at all-guides.com Q'ty/Set MML-AP Location Part No. Description AP0074 AP0094 AP0124 BH2UL BH2UL BH2UL 43723020 CASE, FAN, LEFT 43126119 CASE, FAN, RIGHT 43166026 REMOTE CONTROLLER, SIMPLE, SX-U01EQ 43166013 REMOTE CONTROLLER, SX-TA01UE 43166014 REMOTE CONTROLLER, SX-TB01UE 43166029 REMOTE CONTROLLER 4314J543...
  • Page 92 All manuals and user guides at all-guides.com Electrical parts Q'ty/Set MML-AP Location Part No. Description AP0074 AP0094 AP0124 BH2UL BH2UL BH2UL 43050425 SENSOR ASSY, SERVICE ,TC (F6) : TC2, TCJ 43F50426 SENS0R, SERVICE, TA 43150320 SENSOR ASSY, SERVICE, TG (F4) : TC1 43158182 TRANSFORMER, TT-12 43160626...
  • Page 93 All manuals and user guides at all-guides.com MML-AP0154BH2UL, AP0184BH2UL, AP0244BH2UL – 93 –...
  • Page 94 All manuals and user guides at all-guides.com Q'ty/Set MML-AP Location Part No. Description AP0154 AP0184 AP0244 BH2UL BH2UL BH2UL 43723020 CASE, FAN, LEFT 43126119 CASE, FAN, RIGHT 43166026 REMOTE CONTROLLER, SIMPLE, SX-U01EQ 43166013 REMOTE CONTROLLER, SX-TA01UE 43166014 REMOTE CONTROLLER, SX-TB01UE 43166029 REMOTE CONTROLLER 4314J541...
  • Page 95 All manuals and user guides at all-guides.com Electrical parts Q'ty/Set MML-AP Location Part No. Description AP0154 AP0184 AP0244 BH2UL BH2UL BH2UL 43050425 SENSOR ASSY, SERVICE ,TC (F6) : TC2, TCJ 43F50426 SENS0R, SERVICE, TA 43150320 SENSOR ASSY, SERVICE, TG (F4) : TC1 43158182 TRANSFORMER, TT-12 43160626...
  • Page 96 All manuals and user guides at all-guides.com WARNINGS ON REFRIGERANT LEAKAGE Important Check of Concentration Limit The room in which the air conditioner is to be installed requires a design that in the event of NOTE 2 : refrigerant gas leaking out, its concentration will The standards for minimum room volume are as follows.
  • Page 97 All manuals and user guides at all-guides.com TOSHIBA CARRIER CORPORATION 72-34 Horikawa-cho, Saiwai-ku, Kawasaki-shi, Kanagawa 212-8585, JAPAN Copyright © 2017 TOSHIBA CARRIER CORPORATION, ALL Rights Reserved. Revision record First issue — — Mar., 2016 English was corrected. Page 3, 4, 5, 6, 10, 11, 12, 13,...

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