Error Code 4240 - Mitsubishi Electric PQHY-P72TYHMU-A Service Handbook

[ IX Troubleshooting ]
1. Error Code
4240 (THMU-A)
Overload protection
2. Error definition and error detection method
If the output current of "(Iac) >Imax (Arms)" or "THHS > TOL" is continuously detected for 10 minutes or more during inverter
operation.
Model
P72, P96, P120 models
Model
P72, P96, P120 models
3. Cause, check method and remedy
Cause
(1) Air passage blockage
(2) Power supply environment
(3) Inverter failure
(4) Compressor failure
Refer to section -6- "Inverter (THMU-A)" under part [4] Troubleshooting Principal Parts for error codes related to the
inverter.(page 328)
1. Error Code
4240 (YHMU-A)
Overload protection
2. Error definition and error detection method
If the output current of "(Iac) >Imax (Arms)" or "THHS > 95°C [203°F] " is continuously detected for 10 minutes or more during
inverter operation.
Model
P72, P96, P120 models
3. Cause, check method and remedy
Cause
(1) Air passage blockage
(2) Power supply environment
(3) Inverter failure
(4) Compressor failure
Refer to section -6- "Inverter (YHMU-A)" under part [4] Troubleshooting Principal Parts for error codes related to the
inverter.(page 333)
HWE09080
Imax(Arms)
35
TOL
95°C [203°F]
Check that the heat sink cooling air passage is not blocked
Power supply voltage is 188 V or above.
Refer to IX [4] -6-.(page 328)
Check that the compressor has not overheated during operation.
-> Check the refrigerant circuit (oil return section).
Refer to IX [4] -6- (2) [2].(page 330)
Imax(Arms)
19
Check that the heat sink cooling air passage is not blocked
Power supply voltage is 414 V or above.
Refer to IX [4] -6-.(page 333)
Check that the compressor has not overheated during operation.
-> Check the refrigerant circuit (oil return section).
Refer to IX [4] -6- (2) [2].(page 335)
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Check method and remedy
Check method and remedy
GB