Sinclair SCV-1400EB, Service Manual

Page: 131 / 160

129
For SCV-900EB and SCV-1800EB
F2
Discharge temperature sensor connection
on main PCB is loose
Yes
Ensure the sensor is connected properly
No
Temperature or pressure sensor has
short-circuited or failed
Yes
Replace the sensor
No
Electronic expansion valve coil connection
on main PCB is loose 1
Yes
Ensure the sensor is connected properly
No
Electronic expansion valve coil has
malfunctioned 2
Yes
Replace the EXV
No
Discharge pressure is too high
Yes
The temperature difference between water
inlet and water outlet or water inlet is too
high
No Yes
Replace outdoor main PCB
No
Water flow is insufficient
Yes
Refer to E9 error
Notes:
1.
Electronic expansion valve coil connections are port CN70, CN71 and CN72 on the main PCB (labeled 22, 20,21 in Part 4, 2.2.1 Main PCB component).
2. The normal resistances between EXV coil wiring terminals is 40-50Ω. If any of the resistances differ from the value, the EXV coil has malfunctioned.