Wiring Diagram; Signal Inputs; Outputs - Mitsubishi Electric EHSD-MEC.UK Service Manual

6

WIRING DIAGRAM

6-1. EHSC-MEC, EHSD-MEC, ERSC-MEC
CNPWM
(WHT)
1
3
3
CNP1
TBO.1
(WHT)
1
1
M
1~
2
MP1 3
M
3
1~
M
2WV2b
1~ 4
MP2
5
M
6
1~
MP3
1
M
1~
3
MP4
CNP4
(RED)
TBO.2
Close
1
M N
Open 2
1~
MXV 3
1
4
*1
5
5
6
CNV1
(WHT)
TBO.3
1
Signal output
(Boiler)
2
3
Signal output
(Error)
4
5
Signal output
(Defrost)
6
Signal output 7
(Comp ON)
8
TBO.4
X13
1
CNIH
M
(ORN)
2
2WV2a
1 3
4
3
5
Signal output
(Cooling)
6
1
3
CNBHT
(BLK)
CNBC
(GRY)
1
3
1
3
5
7
CNBH
(WHT)
Table 1 Signal Inputs
Name Terminal block Connector Item
IN1 TBI.1 13-14 — Room thermostat 1 input
IN2 TBI.1 11-12 — Flow switch 1 input
IN3 TBI.1 9-10 — Flow switch 2 input (Zone1) Refer to SW3-2 in <Table 3 DIP Switch Functions>.
IN4 TBI.1 7-8 — Demand control input
IN5 TBI.1 5-6 — Outdoor thermostat input *1 Standard operation Heater operation/ Boiler operation *2
IN6 TBI.1 3-4 — Room thermostat 2 input
IN7 TBI.1 1-2 — Flow switch 3 input (Zone2) Refer to SW3-3 in <Table 3 DIP Switch Functions>.
IN8 TBI.3 1-2 — Electric energy meter 1
IN9 TBI.3 3-4 — Electric energy meter 2
IN10 TBI.3 5-6 — Heat meter
*1. If using outdoor thermostat for controlling operation of heaters, the lifetime of the heaters and related parts may be
reduced.
*2. To turn on the boiler operation, use the main controller to select "Boiler" in "External input setting" screen in the
service menu.
Table 2 Outputs
Name Terminal block Connector
OUT1 TBO.1 1-2 CNP1 Water circulation pump 1 output (Space heating/cooling & DHW)
OUT2 TBO.1 3-4 — Water circulation pump 2 output (Space heating/cooling for Zone1)
Water circulation pump 3 output (Space heating/cooling for Zone2) *1
OUT3 TBO.1 5-6 —
2-way valve 2b output *2
OUT4 TBO.2 4-6 CNV1 3-way valve (2-way valve) output
TBO.2 1-2
OUT5 — Mixing valve output *1
TBO.2 2-3
OUT6 — CNBH 1-3 Booster heater 1 output
OUT7 — CNBH 5-7 Booster heater 2 output
OUT8 TBO.4 5-6 — Cooling signal output
OUT9 TBO.4 3-4 CNIH Immersion heater output
OUT10 TBO.3 1-2 — Boiler output
OUT11 TBO.3 3-4 — Error output
OUT12 TBO.3 5-6 — Defrost output
OUT13 TBO.4 1-2 — 2-way valve 2a output *2
OUT14 — CNP4 Water circulation pump 4 output (DHW)
OUT15 TBO.3 7-8 — Comp ON signal
Do not connect to the terminals that are indicated as "—" in the "Terminal block" field.
*1. For 2-zone temperature control.
*2. For 2-zone valve ON/OFF control.
OCH571
<How to use TBO.1 to 4>
1
Connect them using either way as shown below.
2
4
F1
6
Tool
CN01
F2
(WHT)
Conductor
X1
Outline view
X2
X3
1 TBO.1
2
X14 CNP1
3 1
(WHT)
4 3
5
6
1
1 CNP4
TBO.2
1
(RED)
3
2
X5A
3 SW5
4
5 8
X5B
6 1
1
X4 CNV1
TBO.3
1
SW4
(WHT)
5
2
6
3
1
4
5
SW3
6
7
X10
8
8
1
X11 TBO.4
1
2
SW2
3
X12
4
8
5
1
X15 1
6 CNIH
(ORN)
3
SW1
1 1
CNBC CNBHT
8
(GRY) (BLK)
3 3
X9
1
CNBH
X8
(WHT)
7
CN1A
(WHT)
1
4
2 4 6 8 10 12 14 2 4 6 8 10 12 14
1 3 5 7 9 11 13 1 3 5 7 9 11 13
X6 TBI.1 TBI.3
X7
TBI.1
1 2 3
1 2 1 4 1 3 1 2
t ° t ° t ° t ° t °
OFF (Open)
Refer to SW2-1 in <Table 3 DIP Switch Functions>.
Refer to SW2-2 in <Table 3 DIP Switch Functions>.
Normal Heat source OFF/ Boiler operation *2
Refer to SW3-1 in <Table 3 DIP Switch Functions>.
Refer to installation manual.
Item
Indoor unit powered
via outdoor unit
To outdoor
unit
Tool
L N S1 S2
Conductor
Top view
BLK
1
BLK
2
CN01
(WHT) 4
1
6
2
CN01
(WHT)
4
F2 F1 6
6.3A 250V 10A 250V
1
CN3C
BRN
(BLU)
1
3
CN3C
LED1 ORN
(BLU)
3
1
CNPWM
(WHT)
3
CNRF Wireless receiver
(WHT) (Option)
LED2
CN105 WiFi adapter
(RED) (Option)
LED3
CNIT
(BLU)
1
CN22
(BLU) 2
CN108
LED4
CNW5 CNW12 CN21 CN20
(WHT) (RED) (YLW) (RED) *1
1
1
1 1
3WV
2 2
3
4
4 5 6
TBO.2
2 4 6 8 10 12
M
1 3 5 7 9 11 13
1~
TBI.2
3WV
TBI.3
4 5 6 7 8 9 10 11 12 13 14 1 2 3 4 5 6 7 8 9
+ – + – + –
ON (Short)
OFF ON
OFF ON
OFF ON
OFF ON
Heating DHW
Close
Stop
Open
OFF ON
OFF ON
OFF ON
OFF ON
OFF ON
Normal Error
Normal Defrost
OFF ON
OFF ON
OFF ON
10
Indoor unit powered
by independent source
To outdoor
Power supply
~/N 230V 50Hz unit
S3
TB1 L N S1 S2 S3 TB1
BLK
BLK
1
2
CN01
4
(WHT)
6
BRN
1
CN3C
ORN
(BLU)
3
1. Symbols used in wiring diagram are,
: connector, : terminal block.
2. Indoor unit and outdoor unit connecting wires
have polarities, make sure to match terminal
numbers (S1, S2, S3) for correct wirings,
3. Since the outdoor unit side electric wiring may
change, be sure to check the outdoor unit electric
wiring diagram for service.
2WV1
4 5 6
TBO.2
M
1~
2WV1
10 11 12 13 14 1 2 3 4 5 6 7 8 9 10 11 12 13 14
CN22
(BLU)
1 2
t ° t ° t ° t ° t ° t °
Symbol Name
TB1 Terminal block <Power supply, Outdoor unit>
MP1 Water circulation pump 1(Space heating & DHW)
MP2 Water circulation pump 2
(Space heating for Zone1)(Local supply)
MP3 Water circulation pump 3
(Space heating for Zone2)(Local supply)
MP4 Water circulation pump 4 (DHW)(Local supply)
3WV(2WV1) 3-way valve (2-way valve 1)(Local supply)
2WV2a 2-way valve (For Zone 1)(Local supply)
2WV2b 2-way valve (For Zone 2)(Local supply)
MXV Mixing valve (Local supply)
Symbol Name
TH1 Thermistor (Room temp.)(Option)
TH2 Thermistor (Ref. liquid temp.)
THW1 Thermistor (Flow water temp.)
THW2 Thermistor (Return water temp.)
THW5 Thermistor (DHW tank water temp.)(Option)
THW6 Thermistor (Zone1 flow temp.)(Option)
THW7 Thermistor (Zone1 return temp.)(Option)
THW8 Thermistor (Zone2 flow temp.)(Option)
THW9 Thermistor (Zone2 return temp.)(Option)
THWB1 Thermistor (Boiler flow temp.)(Option)
THWB2 Thermistor (Boiler return temp.)(Option)
IN1 Room thermostat 1 (Local supply)
IN2 Flow switch 1 (Local supply)
IN3 Flow switch 2 (Local supply)
IN4 Demand control (Local supply)
IN5 Outdoor thermostat (Local supply)
IN6 Room thermostat 2 (Local supply)
IN7 Flow switch 3 (Local supply)
IN8 Electric energy meter 1 (Local supply)
IN9 Electric energy meter 2 (Local supply)
IN10 Heat meter (Local supply)
FLOW TEMP. CONTROLLER (FTC5)
TBO.1−4 Terminal block <Outputs>
TBI.1−3 Terminal block <Signal Inputs, Thermistor>
F1 Fuse (T10AL250V)
F2 Fuse (T6.3AL250V)
SW1−5 DIP switch *See Table 3
X1−15 Relay
LED1 Power supply (FTC5)
LED2 Power supply (Main controller)
LED3 Communication (FTC5-Outdoor unit)
LED4 Reading or writing data to SD card
CNPWM Pump speed control signal for MP1
CN108 SD card connector