Mitsubishi Electric CAHV-R450YA-HPB Installation & Operation Manual page 56

Error
code *1
Error type
(PCB *2)
Current sensor/circuit fault
5305
5306
136
( )
THL sensor/circuit fault
5120
01
( )
Inverter Serial communication error
error
0403
01 05
( ) ( )
( 06 )
IPM system error
Remote Address overlap
6830
control-
ler error
Non-consecutive address, system error Address setting error
7109 (incl.
remote
control- Remote controller signal reception error
6831 ler wir- 1
ing
fault)
Remote controller signal transmission
6832
error
Remote controller signal reception error
6834
2
Multiple Address setting error
7105
system
error
Incompatible combination of units
7130
No.-of-connected-unit setting is
7102
incorrect.
Communication error between the main and sub
6500
units
Transmission line power supply PCB fault
6600
Communication error between the main and sub
6602
units (Simple multiple unit control mode)
6603
6606
6607
6608
*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.
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).
Communication error due to
external noise interference
*7
56
Cause
(Parts problems)
• 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
Preliminary
side Remote
(PCB)
code
Operation
SWS1
SW
4305
4306
136
( )
1248
01
( )
4300
4305
4306
( 01 ) ( 05 )
06
( )