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Mitsubishi Electric CAHV-P500YA-HPB Instruction Manual page 11

Air-cooled heat pump unit cahv series
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Error
code *1
(PCB *2)
Inverter
DCCT sensor
error
5301
5305
116
(
)
5301
ACCT sensor/circuit fault
5305
117
(
)
DCCT sensor/circuit fault
5301
5305
118
(
)
Open-circuited IPM/loose ACCT sensor
5301
5305
119
(
)
Faulty wiring
5301
5305
120
(
)
THHS sensor/circuit fault
5110
01
05
(
) (
)
Serial communication error
0403
01
05
(
) (
)
IPM system error
Multiple
Address setting error
7105
unit
system
Incompatible combination of units
7130
error
No.-of-connected-unit setting is incorrect.
7102
Communication error between the main and sub
units
6500
Communication error between the MAIN and SUB
circuits
6600
Transmission line power supply PCB fault
Communication error between the main and sub
6602
6603
units (Simple multiple unit control mode)
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 cannot 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.
Error type
*7
Cause
(Installation/Setting error)
INV board switch setting error
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
11/20
Cause
(Parts problems)
Poor contact at the INV board
connector CNCT
Poor contact at the INV board
connector DCCT
Ground fault of the compressor
and IPM error
Poor contact at the INV board
connector CNCT2 (ACCT)
ACCT sensor fault
Poor contact at the INV board
connector CNCT
Poor contact at the INV board
connector DCCT
DCCT sensor fault
INV board fault
Disconnected ACCT sensor
(CNCT2)
ACCT sensor fault
Broken compressor wiring
INV circuit fault (IPM error etc.)
ACCT sensor is connected in the
wrong phase.
ACCT sensor is connected in the
wrong orientation.
THHS sensor contact failure
THHS 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 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
side
Remote
(PCB)
Operation
SWS1
SW

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