Sinclair SCV-1400EB, Service Manual

Page: 120 / 160

118
5.23 F0 Troubleshooting
Digital display output
Description

1F0 indicates a communication error between the main control chip and the compressor A inverter driver chip.

2F0 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.
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.
Possible causes

Incorrect compressor inverter module address setting.
 Loosened communication wiring from the main PCB to
the inverter module.

Bridge rectifier damaged.
 Main PCB damaged.

Compressor inverter module damaged.
Procedure,
For SCV-750EB and SCV-1400EB
F0 error
Compressor inverter module address setting
is incorrect
Reset the compressor inverter
module address via dial switch
S7 on inverter module
1
Communication wire from outdoor main
PCB CN26 to inverter module CN8/CN9 is
loosened 2
Reconnect the communication
wire
LED3 on inverter module are off when
power on 3
No
No
Yes
Yes
Check the power supply circuit
4
Yes
Replace the outdoor main PCB, is the
malfunction solved?
No
Normal
Yes
No
Replace the inverter module