Xh0: Communication Error - Midea V6-i Series Service Manual

V6-i VRF 50/60Hz

2.12 xH0: Communication error

2.12.1 Digital display output
In the error code, '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.
2.12.2 Description
 1H0 indicates a communication error between the main control chip and the compressor A inverter driver chip.
 2H0 indicates a communication error between the main control chip and the compressor B inverter driver chip.
 All units stop running.
 Error code is only displayed on the unit with the error.
2.12.3 Trigger / recover condition
 Trigger condition: Main control chip and inverter driver chip cannot communication for 2 minutes.
 Recover condition: Communication go back to normal.
 Reset method: Resume automatically.
2.12.4 Possible causes
 Incorrect compressor inverter module address setting.
 Loosened communication wiring from the main PCB to
the inverter module.
2.12.5 Procedure
H0 error
Compressor inverter module address
setting is incorrect
No
Communication wire from outdoor
main PCB CN26 to inverter module CN8/
CN9 is loosened
No
Both LED1 and LED2 on inverter module
are off when power on
No
Replace the outdoor main PCB, is the
malfunction solved?
No
Replace the inverter module
92
Reset the compressor
Yes
inverter module address via
dial switch S7 on inverter
Yes
2
Yes
Check the power supply
3
Yes
 Bridge rectifier damaged.
 Main PCB damaged.
 Compressor inverter module damaged.
1
module
Reconnect the
communication wire
4
circuit
Normal