Sinclair SCV-1400EB, Service Manual

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89
Procedure
P1
Insufficient refrigerant caused by
refrigerant leakage 1
Yes
Add refrigerant or inspect the system for
leaks
No
The low pressure side is blocked, caused by
crushed or bent pipe, blocked EXV, or dirty
filter 2
Yes
Inspect the system and fix the error. If the
filter is blocked by ice, the piping should be
cleaned
No
The air side heat exchanger heat exchange
is poor in heating mode 3
Yes
Inspect the refrigerant system and fix the
error
No
The water flow rate is not sufficient in
cooling mode 4
Yes
Inspect the water system and fix the error
No
Replace main PCB
Notes: 
1. To check for insufficient refrigerant: An insufficiency of refrigerant causes compressor discharge temperature to be higher than normal, discharge and
suction pressures to be lower than normal and compressor current to be lower than normal, and may cause frosting to occur on the suction pipe. These
issues disappear once sufficient refrigerant has been charged into the system.
2. A low pressure side blockage causes compressor discharge temperature to be higher than normal, suction pressure to be lower than normal and
compressor current to be lower than normal, and may cause frosting to occur on the suction pipe. For normal system parameters.
3. Check air side heat exchanger, fan(s) and air outlets for dirt/blockages.
4. Check water side heat exchanger, water piping, circulator pumps and water flow switch for dirt/blockages.