Error Code [4240] - Mitsubishi Electric PUHY-P200 Service Handbook

[7-6 Error Code Definitions and Solutions: Codes [4000 - 4999] ]
7-6-17

Error Code [4240]

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](page 168)
3. Cause, check method and remedy
Cause
(1) Air passage blockage
(2) Power supply environment
(3) Inverter failure
(4) Compressor failure
(5) The model selection switches
(SW5-3 - 5-8) on the outdoor
unit are set incorrectly.
For inverter-related error codes, refer to the following page(s). [8-9 Troubleshooting Inverter Problems](page 264)
HWE14040
Check method and remedy
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). [8-9 Troubleshooting Inverter Problems](page
264)
Check that the compressor has not overheated during operation.
→ Check the refrigerant circuit (oil return section).
Refer to the following page(s). [8-9-3 Checking the Compressor for Ground Fault
and Coil Resistance Problems](page 266)
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]](page
227)
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GB