Mitsubishi Electric CAHV-P500YA-HPB, Service Handbook

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[
IX
Troubleshooting ]
- 115 -
HWE10060 GB
2. Error code list
*Preliminary error codes will not appear on the 7-segment LED.
Error Type
Cause
(problem with the installation environment/setting error)
Cause
(component problem)
Error Code
Circuit board Remote controller
Resetting the error Unit side
board)
(Circuit
Remote
SWS1
Operation SW
Errors have not been reset.
*6
Some of the errors have not been reset. ●Water outage ●Water depletion ●Water outage ●Excessive refrigerant oil ●Outside temperature is below the minimum usage temperature. ●Sudden frosting or heavy snow has clogged the heat exchanger. ●Outside temperature is above the maximum usage temperature.
A000
Power failure
*4
●A power interruption of 200 ms or longer was detected. ●The flow switch goes off and stays off for three seconds or longer during Thermo-ON. ●A shell bottom temperature of 10ºC or below has been detected for 40 minutes while the compressor is in operation. ●A discharge temperature of 10ºC or below has been detected for 40 minutes while the compressor is in operation. Note: Shell bottom SH = (Shell temp. - Evaporation temp.) Note: Discharge SH = (Discharge refrigerant temp. - condensation temp.)
●
There was a power failure while t
he
ON/OFF switch was on.
●
Twenty-one or more errors occurred, and only the latest 20
errors have been cleared. (Resetting more than 20 errors all at once requires a power reset.)
A-P0
Water-supply cutoff (Flow switch)
●Water flow rate has dropped below the threshold of the flow switch.
●Open-circuited flow switch ●Broken flow switch wiring ●Electronic expansion valve fault ●High-pressure sensor fault ●Fan motor error/broken motor wire ●Low-pressure sensor fault ●Shell temperature thermistor fault ●High-pressure sensor fault ●Discharge refrigerant temperature thermistor fault ●Electronic expansion valve fault ●Solenoid valve fault in the hot gas circuit ●Low-pressure sensor fault ●Air-side HEX inlet themistor detection error ●Suction refrigerant temperature thermistor fault ●Electronic expansion valve bypass check valve fault on the main circuit ●Electric expansion valve fault on the main circuit ●Fan motor error/broken motor wire ●Refrigerant shortage (gas leakage) ●Shell temperature thermistor fault ●Electric expansion valve fault on the main circuit ●Thermistor input circuit fault on the control board (Thermistor fault, pinched lead wire, missing pins on the connectors) ●Thermistor input circuit fault on the control board (Thermistor fault, pinched lead wire, missing pins on the connectors) (Thermistor fault, pinched lead wire, missing pins on the connectors) (Thermistor fault, pinched lead wire, missing pins on the connectors) (Thermistor fault, pinched lead wire, missing pins on the connectors) ●Broken or short-circuited thermistor wiring ●Broken or short-circuited thermistor wiring ●Thermistor input circuit fault on the control board ●Broken or short-circuited thermistor wiring ●Thermistor input circuit fault on the control board ●Broken or short-circuited thermistor wiring ●Thermistor input circuit fault on the control board ●Broken or short-circuited thermistor wiring
AFSA
High-pressure fault
●The high pressure switch SW (63H) tripped after one second has passed since the operation command was turned on.
AHP1
Liquid refrigerant floodback
AdSH
Vacuum protection
●The low pressure has dropped below 0.06 MPa within 30 seconds of compressor start-up. ●The low pressure has dropped below 0.06 MPa within 30 seconds of the start of a defrost cycle. ●During water heating, the low pressure has dropped by 0.02 MPa after the air-side heat exchanger inlet temperature has reached -31ºC. ●During water heating, the low pressure has dropped by 0.02 MPa after the air-side suction pipe temperature has reached -33ºC. ●The outside temperature of 10ºC or above has been detected for 20 minutes and the low pre- ssure has dropped below 0.06 MPa during water heating.
1303
Abnormal compressor shell temperature
●A shell bottom temperature of 80ºC or above has been detected for 20 seconds while the compressor is in operation.
1103
Outside temperature (TH9)
●A temperature of -50ºC or below OR 80ºC or above has been detected for 20 seconds or longer while the operation command is on.
5109
Water inlet temperature (TH10 MAIN circuit) Water inlet temperature (TH12 SUB circuit)
●A temperature of -10ºC or below OR 80ºC or above has been detected for 20 seconds or longer while the operation command is on.
5110 5112
Water outlet temperature (TH11 MAIN circuit) Water outlet temperature (TH13 SUB circuit)
5111 5113
Compressor shell temperature (TH3 MAIN circuit) Compressor shell temperature (TH7 SUB circuit)
●A temperature of -50ºC or below OR 100ºC or above has been detected for 20 seconds or longer while the operation command is on.
5103
5107
Discharge temperature (TH1 MAIN circuit) Discharge temperature (TH5 SUB circuit)
●A discharge temperature of -20ºC or below OR 200ºC or above has been detected for 20 seconds while the operation command is on.
(on the open-circuited side, this error is detedcted only after two minutes have passed after compressor startup.)
●A temperature of -10ºC or below OR 80ºC or above has been detected for 20 seconds or longer while the operation command is on.
5101 5105
Thermistor fault