Johnson Controls CWP Manual De Instalación Y Mantenimiento página 40

Troubleshooting
Anomaly
One or both compressors
are not working.
Activation of the LP alarm,
stop of the unit.
Activation of the HP alarm,
stop of the unit.
The liquid line is too hot.
Frosting of the liquid line.
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Cause
Breaking of the electric circuit.
Intervention of the HP pressure
switch.
The fuse of the control circuit is bro-
ken.
Loosened terminals.
Halt caused by thermal overload of
the electric circuit.
Wrong wiring.
The line voltage is too low.
Short-circuit of the compressor's mo-
tor.
Seized compressor.
Gas leak.
Insufficient charge
Failure of the pressure switch.
Failure of the pressure switch.
The delivery valve is partially
closed.
Substances with condensable gases
in the circuit.
Insufficient charge.
The valve of the liquid line is partial-
ly closed.
The liquid filter is clogged.
Operation
Check the electric circuit and detect
any ground dispersions and short cir-
cuits. Check fuses.
Reset the pressure switch and the con-
trol panel and restart the appliance.
Identify and remove the cause that en-
abled the pressure switch.
Check for ground dispersions and
short circuits. Replace fuses.
Check and tighten.
Check the operation of check and
safety devices. Identify and remove
the cause.
Check wiring of check and safety de-
vices.
Check voltage. If problems regard the
system, solve them. If they are caused
by the distribution network, inform the
Energy Distributor.
Check the continuity of the winding.
Replace the compressor.
Identify and remove the leak.
Refill.
Replace the pressure switch.
Check the operation of the pressure
switch, replace it if defective.
Open the valve and replace it, if
faulty.
Drain the circuit.
Identify and remove the cause of the
loss of charge and refill.
Check that valves are open.
Replace the cartridge or the filter.