Basic Troubleshooting - Veco CLIMMA CWS DC INVERTER Series Installation, Usage And Maintenance Manual

5.2. Basic troubleshooting

PROBLEM: SYSTEM IS NOT STARTING

With power off, check that the power supply is correctly connected to the unit and that the circuit
breaker dedicated to the system is on.

With power off, check the electrical connections to see if there is a bad connection at a terminal
block of the electrical control box.

With power off, check that the circuit breaker on the system is on (the circuit breaker is on-board,
between the electrical box and the EMC filter-inverter).

With power off, check between ground and L and N to see if there is continuity, then continue to
all components to find the problem. Correct or replace the component if continuity is found.

If the problem has always been there, check the circuit breaker, maybe it is not enough.
PROBLEM: A PUMP IS NOT STARTING

Check the power supply to the pump (check the connection from the electrical control box to the
pump)

NB. The pumps are working only when the compressor is running.
PROBLEM: SYSTEM NOT COOLING/HEATING

If compressor is running, then the system might have lost some refrigerant. Call an authorized
Veco service center and check the system pressures (discharge and suction).

If compressor is not running:
o check if "Status" is OFF, then switch it to "Winter" or to "Summer". In OFF status the
compressor is not supposed to run.
o check if the unit has already reached the set-point (in Winter mode, the return water
temperature has to be higher or equal to the set-point, in Summer mode, the return
water temperature has to be lower or equal to the set-point)
PROBLEM: HIGH PRESSURE ERROR

(in Summer mode) Check the sea water flow and clean the strainer or the condenser if necessary.

(in Winter mode) Check the circulation circuit flow and check the circulation pump.

Check if the sea water pump is running correctly.
Veco S Installation Manual –Page 20 / 20