Mitsubishi Electric CAHV-R450YA-HPB Service Manual page 149

[ X Troubleshooting ]
Error type
Inverter
DCL electric current circuit error
error
Current sensor fault
Current sensor/circuit fault
THL sensor/circuit fault
Serial communication error
IPM system error
Remote Address overlap
control-
ler error
Non-consecutive address, system error Address setting error
(incl.
remote
control- Remote controller signal reception error
ler wir- 1
ing
fault)
Remote controller signal transmission
error
Remote controller signal reception error
2
Multiple Address setting error
system
error
Incompatible combination of units
No.-of-connected-unit setting is
incorrect.
Communication error between the main and sub
units
Transmission line power supply PCB fault
Communication error between the main and sub
units (Simple multiple unit control mode)
*1: The codes in the parentheses in the "Error code" column indicate error detail codes.
*2: If an error occurs, error codes shown above will appear in the 4-digit digital display on the PCB.
*3: Definition of symbols in the "Error reset" column.
: Errors that can be reset regardless of the switch settings
: Errors that can be reset if the remote reset setting on the unit is set to "Enable" (factory setting)
Errors that cannot be reset if the remote reset setting on the unit is set to "Disable"
: Errors that cannot be reset
: Errors that will be automatically cancelled once its cause is removed
*4: Power failure will be detected as an error only when the "Automatic recovery after power failure" setting on the unit is set to "Disable."
(The default setting for the "Automatic recovery after power failure" setting is "Enable.")
*5: Depending on the system configuration, if communication error lasts for 10 minutes or longer, units will make an abnormal stop.
This error can be reset by turning off and then back on the unit's power.
*6: This error code will appear when multiple errors occur that are reset in different ways and when one or more of these errors have not been reset. This error can
be reset by turning off and then back on the unit's power.
*7: Before resetting this error, remove its causes. Resuming operation without removing the causes of heat exchanger freeze up will cause heat exchanger damage.
*8: When the AE-200 is disconnected from a system and will not be reconnected, the circuit board needs to be factory reset to reset the errors. Refer to
II [6] "(7) Factory reset" for how to reset the circuit board.
HWE22020
Cause
(Installation/Setting error)
INV board switch setting
error
There are two or more of
the same address.
(Non-consecutive address)
Remote controller cable is
not connected.
Broken wiring
Communication error due to
external noise interference
Communication error due to
external noise interference
Address setting error
(Non-consecutive address)
Different types of units are
connected to the same
system.
No.-of-connected-unit
setting is incorrect (Main
unit).
*8
Communication error due to
external noise interference
*5
- 140 -
Cause
(Parts problems)
• Contact failure between CNCT1A and
CNCT1B
• INV board fault
• Fan board fault
• Fan motor error
• Fan board fault
• THL sensor contact failure (CNTH)
• THL sensor fault
• INV board fault
• Communication error between control
board and INV board (noise
interference, broken wiring)
• Wiring or connector connection
between connectors on IPM-driven
power supply circuit
• INV board fault
• Broken remote controller wiring
• Main control board communication
circuit fault
• Main control board communication
circuit fault
• Main control board communication
circuit fault
• Broken wiring to the transmission
power supply circuit board (between
the main and sub units)
• Transmission power supply PCB
communication circuit fault
Error reset *3
Unit
Error
Preliminary
side Remote
code *1
(PCB)
code
(PCB *2)
Operation
SWS1
4300 5301
127 127
( ) ( )
4305 5305
4306 5306
135 135
( ) ( )
4305 5305
4306 5306
136 136
( ) ( )
1248 5120
01 01
( ) ( )
4300
4305 0403
4306 01 05
( ) ( )
06
01 05
( )
( ) ( )
06
( )
6830
7109
6831
6832
6834
7105
7130
7102
6500
6600
6602
6603
6606
6607
6608
SW
GB