Midea MV5-X252W/V2GN1 Service Manual page 95

V5 X VRF 50/60Hz
4.21 PL, C7 Troubleshooting
4.21.1 Digital display output
4.21.2 Description
 PL indicates inverter module temperature protection. When the main inverter module temperature rises above 80
the system displays PL protection and all units stop running.
 C7 indicates PL protection has occurred 3 times in 100 minutes. When a C7 error occurs, a manual system restart is
required before the system can resume operation.
 Error code is only displayed on the unit with the error.
4.21.3 Possible causes
 Blocked, dirty or loose heat sink.
 Temperature sensor not connected properly or has malfunctioned.
 Main PCB damaged.
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