• 61 •
Installation manual /eCOMFORT-MIL150E-0916 / 05/2017
4.6.- FAILURE DIAGNOSIS
PROBLEM CAUSE ACTION
The unit does not start after the last start.
• Disconnected supply.
• Main switch set to STOP.
• No water fl ow.
• Fuses are broken.
• Low electrical supply.
• One of the safety devices has been
activated.
• Compressor fault.
• Low water temperature.
• Check electrical supply.
• Connect main switch.
• Start water pump (and check air in
system).
• Check voltage.
• Check antifreeze thermostat.
• Check high/low pressure switch.
• Change compressor.
• Create demand for cooling.
The fan does not work (although the
compressor is operating).
• Internal safety device open.
• Bad connection.
• Poor condensation control.
• Let the motor cool.
• Connect properly.
• Check operation.
The compressor stops when the high
pressure switch is cut off.
• Condenser coil blocked.
• Unit operating outside of limiting.
• Abnormal operation of the fans.
• Maintain condenser coil.
• Check the ventilators.
The compressor stops when the low
pressure switch is cut off.
* Insuffi cient charge.
* The water exchanger is blocked (water
side).
* No water fl ow.
* Expansion valve blocked
* Check the charge.
* Maintain the exchanger.
* Check that there is suffi cient
water fl ow.
* Change expansion valve.
The oil level in the compressor is very low. • The crank case heater is not working.
• Replace the crank case heater and
check oil level.
High noise level of compressor and high
and low pressures are abnormal.
• Phase connection for compressor power
supply incorrectly.
• Switch the wires between two of the
phases of compressor power supply.
4. MAINTENANCE
To Next Page
Loading...
