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Error Code [4240] (Tkmu); Error Code [4240] (Ykmu) - Mitsubishi Electric PURY-HP72 Service Handbook

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[7-6 Error Code Definitions and Solutions: Codes [4000 - 4999] ]
7-6-19

Error Code [4240] (TKMU)

1. Error code definition
Overload protection
2. Error definition and error detection method
If the output current of "(Iac) > 53 (Arms)" or "THHS > 80°C [175°F]" is continuously detected for 10 minutes or more during
inverter operation.
3. Cause, check method and remedy
Cause
(1)
Air passage blockage
(2)
Power supply environment
(3)
Inverter failure
(4)
Current sensor (ACCT) failure
(5)
Compressor failure
For inverter-related error codes, refer to the following page(s). [8-10 Troubleshooting Inverter Problems (TKMU)](page 288)
7-6-20

Error Code [4240] (YKMU)

1. Error code definition
Overload protection
2. Error definition and error detection method
If the output current of "(Iac) > 27 (Arms)" or "THHS > 95°C [203°F] " is continuously detected for 10 minutes or more during
inverter operation.
3. Cause, check method and remedy
Cause
(1)
Air passage blockage
(2)
Power supply environment
(3)
Inverter failure
(4)
Compressor failure
For inverter-related error codes, refer to the following page(s). [8-11 Troubleshooting Inverter Problems (YKMU)](page 298)
HWE13080
Check method and remedy
Check that the heat sink cooling air passage is not blocked
Power supply voltage is 188 V or above.
Refer to the following page(s). [8-10 Troubleshooting Inverter
Problems (TKMU)](page 288)
Refer to the following page(s). [8-10-13 Simple Check on Inverter
Circuit Components](page 295)
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](page 290)
Check method and remedy
Check that the heat sink cooling air passage is not blocked
Power supply voltage is 414 V or above.
Refer to the following page(s). [8-11 Troubleshooting Inverter
Problems (YKMU)](page 298)
Check that the compressor has not overheated during operation.
→ Check the refrigerant circuit (oil return section).
Refer to the following page(s). [8-11-3 Checking the Compressor
for Ground Fault and Coil Resistance Problems](page 300)
- 203 -
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