Error Codes [4240, 4245, 4246] - Mitsubishi Electric PUHY-M200YNW-A1 Service Handbook

[7-6 Error Code Definitions and Solutions: Codes [4000 - 4999] ]
7-6-24

Error Codes [4240, 4245, 4246]

1. Error code definition
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 during inverter operation.
Refer to the following page(s). [7-1 Error Code and Preliminary Error Code Lists]
3. Cause, check method and remedy
Outdoor unit
Cause
(1) IPM contact failure
(2) Air passage blockage
(3) Power supply environment
(4) Inverter, FAN board failure
(5) Compressor failure
(6) The model selection switches
(SW5-3 - 5-8) on the outdoor
unit are set incorrectly.
Hydro unit
Cause
(1) IPM contact failure
(2) Air passage blockage
(3) Power supply environment
(4) Inverter failure
(5) Pump failure
For inverter-related error codes, refer to the following page(s). [8-10 Troubleshooting Inverter Problems]
BS_07_E
Check method and remedy
Check the IPM and cooling plate for proper contact. (Remove the inverter board,
and check the IPM heatsink grease.)
Check that the heat sink cooling air passage is not blocked
Power supply voltage is 342 V or above.
Refer to the following page(s). [8-10 Troubleshooting Inverter Problems]
Check that the compressor has not overheated during operation.
→ Check the refrigerant circuit (oil return section).
Refer to the following page(s). [8-10-3 Checking the Compressor for Ground
Fault and Coil Resistance Problems]
Check the setting for the model selection switch on the outdoor unit (Dipswitches
SW5-3 - 5-8 on the outdoor unit control board).
For switch settings, refer to the following page(s). [7-9-2 Error Code [7101]]
Check method and remedy
Check the IPM and cooling plate for proper contact. (Remove the inverter board,
and check the IPM heatsink grease.)
Check that the heat sink cooling air passage is not blocked
Power supply voltage is 198 V or above.
Refer to the following page(s). [8-10 Troubleshooting Inverter Problems]
Refer to the following page(s). [8-10-11 Checking the Pump Motor for Ground
Fault and Coil Resistance Problems]
43
chapter 7 -