24
18.03. 5719210_03
ANL / 290-650
EN
16. FAULTS AND REMEDIES
FAULT
CAUSE
REMEDY
Unit does not start
•
Lack of electrical voltage
•
Check electrical voltage is present
•
Check the upstream safety devices providing power
to the unit
•
General isolator is OFF
•
Remote contact is OFF (if present)
•
Control panel is OFF
•
Main isolator is OFF
•
Compressor circuit breaker is OFF
•
Place in ON
•
Power supply voltage too low
•
Check power supply
•
Compressor contactor coil faulty
•
Electronic board faulty
•
Starting capacitor faulty
•
Compressor faulty
•
Replace the component
Low capacity output
•
Lack of refrigerant charge
•
Condenser coil dirty
•
Water filter clogged
•
Unit location
•
Operating outside of limits
•
Check charge and for leaks
•
Clean condenser coil
•
Clean water filter
•
Check performance
•
Check against operating limit charts
Compressor noisy
•
Liquid refrigerant return to compressor
•
Inadequate fixing down
•
Check and correct
•
Phase reversal
•
Reverse one phase (400V/3N/50Hz only)
Noise and vibrations
•
Contact between metal components
•
Check and correct
•
Weak base support
•
Improve base support
•
Loose fixings
•
Tighten fixings
Compressor stops on safeties
•
Discharge pressure too high
•
Suction pressure too low
•
Power supply voltage too low
•
Electrical connections loose
•
Operating outside of limits
•
Check against operating limits chart
•
Pressostat faulty
•
Replace the component
•
Thermal cut-out operates
•
Check voltage and settings
•
Check insulation of windings
Compressor discharge pressure high
•
External air temperature high
•
System water inlet temperature high
•
Check against operating limits chart
•
Insufficient air flow
•
Insufficient water flow
•
Check:
1.
fan operation
2.
condenser coil clean
3.
pump operation (and speed)
4. water filter clean
•
Faulty fan control
•
Check and replace if faulty
•
Air in water circuit
•
Vent circuit
•
Refrigerant charge too high
•
Check charge and adjust
Discharge pressure low
•
External air temperature low
•
System water inlet temperature low
•
Check against operating limits chart
•
Moisture in refrigerant circuit
•
Remove charge and replace
•
Air in water circuit
•
Vent circuit
•
Refrigerant charge too low
•
Check charge and adjust
Suction pressure high
•
External air temperature high
•
System water inlet temperature high
•
Thermostatic expansion valve too open or faulty
•
Check against operating limits chart
•
Adjust or replace if faulty
Suction pressure low
•
System water inlet temperature low
•
External air temperature low
•
Thermostatic expansion valve faulty or obstructed
•
Check against operating limits chart
•
Adjust or replace if faulty
•
Insufficient water flow
•
Insufficient air flow
•
Check:
1.
fan operation
2.
condenser coil clean
3.
pump operation (and speed)
4. water filter clean
Summary of Contents for Variable Multi Flow ANL 290
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