Midea MV6-R252WV2RN1 - 3.9 F7: Main power off (for MS01); 3.9.1 Digital display output; 3.9.2 Description; 3.9.3 Trigger; recover condition

V6R VRF 50Hz
159
Part
6
-
Diagnosis and Troubleshooting
3.9 F7: Main power off (for MS01)
Digital display output
Description
 Main power off.
 All units stop running.
 Error code is displayed on the malfunction MS box.
 The indoor unit display board or wired controller connected to this MS displays "F8”.
Trigger / recover condition
 Trigger condition: MS main power off, and UPS power is ON.
 Recover condition: MS main power on, and UPS power is OFF.
 Reset method: Resume automatically.
Possible causes
 Abnormal power supply.
 The power supply wiring is loose.
 MS PCB damaged.
Procedure
F7
Main power supply shut off.
Yes
Provide normal power supply.
No
The power supply wiring is loose.
Yes
Ensure the wires are connected properly.
No
Replace the MS main PCB