Midea MV6-i400WV2GN1-E - Xf1: DC Bus Voltage Error

V6-i VRF 50/60Hz
86
Midea V6-i Series Service Manual
2.9 xF1: DC bus voltage error
Digital display output 2.9.1
'x' is a placeholder for the compressor system (compressor and related electrical components), with 1 representing
compressor system A and 2 representing compressor system B.
Description 2.9.2
 1F1 indicates compressor A DC bus voltage error; 2F1 indicates compressor B DC bus voltage error.
 All units stop running.
 Error code is only displayed on the unit with the error.
Trigger / recover condition 2.9.3
 Trigger condition: DC bus voltage < 350V or DC bus voltage > 700V continuously for 10 seconds.
 Recover condition: DC bus voltage goes back to normal.
 Reset method: Restart automatically.
Possible causes 2.9.4
 Loosened wiring of the compressor inverter module.
 Incorrect wiring of the reactor and DC bus wire.
 Abnormal power supply.
 Inverter module damaged.