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[ IX Troubleshooting ]
- 254 -
HWE09080 GB
1. Error Code
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.
3. Cause, check method and remedy
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
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.
3. Cause, check method and remedy
Refer to section -6- "Inverter (YHMU-A)" under part [4] Troubleshooting Principal Parts for error codes related to the
inverter.(page 333)
4240 (THMU-A)
Model Imax(Arms)
P72, P96, P120 models 35
Model TOL
P72, P96, P120 models 95°C [203°F]
Cause Check method and remedy
(1) Air passage blockage Check that the heat sink cooling air passage is not blocked
(2) Power supply environment Power supply voltage is 188 V or above.
(3) Inverter failure Refer to IX [4] -6-.(page 328)
(4) Compressor failure 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)
4240 (YHMU-A)
Model Imax(Arms)
P72, P96, P120 models 19
Cause Check method and remedy
(1) Air passage blockage Check that the heat sink cooling air passage is not blocked
(2) Power supply environment Power supply voltage is 414 V or above.
(3) Inverter failure Refer to IX [4] -6-.(page 333)
(4) Compressor failure 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)