Pl, C7: Inverter Module Temperature Protection - Midea VRF Series Service Manual

2.25 PL, C7: Inverter module temperature protection

Digital display output
Description
 All units stop running.
 Error code is displayed on the unit with the error.
Trigger / recover condition
 Trigger condition:
For PL protection: Refer to Part 3 6.5 Inverter Module Temperature Protection Control
For C7 protection: PL protection appears three times in 100 minutes.
 Recover condition:
Refer to Part 3 6.5 Inverter Module Temperature Protection Control
 Reset method:
For PL protection: Resume automatically.
For C7 protection: Manually restart.
Possible causes
 Blocked, dirty or loose heat sink.
 Inverter module damaged.
Procedure
The inverter module heat sink is blocked
The screws connecting the heat sink to
the inverter module are loose
Replace the inverter module
PL / C7
or dirty
No
No
Yes
Clean or replace the heat sink
Tighten the screws and make sure the
Yes
heat sink is well-connected
V6R VRF 50/60Hz
137