Lennox EMEA eCOMFORT2, Инструкция по установке, эксплуатации и обслуживанию

Страница: 64 / 68

• 62 • Installation manual / eCOMFORT-MIL160E-0720 / 07/2020
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 flow.
•
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.
* Insufficient charge.
* The water exchanger is blocked (water
side).
* No water flow.
* Expansion valve blocked
* Check the charge.
* Maintain the exchanger.
* Check that there is sufficient water flow.
* 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