Sinclair SCV-750EB Service Manual page 122

For SCV-900EB and SCV-1800EB
Compressor inverter module address setting
Communication wire from outdoor main
PCB CN65 to inverter module CN8/CN9 is
Both LED1 and LED2 on inverter module are
Replace the outdoor main PCB, is the
Replace the inverter module
Notes:
1. Compressor inverter module address is set through dial switch S7 on the inverter module. The compressor inverter module A/B location refers to the wiring
diagram.
Switch
S7
2. Communication wire from outdoor main PCB CN65 to inverter module CN8/CN9.
3. ED1/2 on inverter module
120
F0 error
is incorrect
No
loosened 2
No
off when power on 3
No
malfunction solved?
No
Compressor A inverter module address setting
Compressor B inverter module address setting
Communication port CN65 on main PCB
Reset the compressor inverter
Yes
module address via dial switch
S7 on inverter module
Yes
Reconnect the communication
wire
Yes
Check the power supply circuit
Yes
Normal
Description
Communication port CN8/CN9 on inverter module
1
4
S7-1 S7-2
OFF OFF
OFF ON