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EKW FX10 INSTALLATION MANUAL
Troubleshooting
Should a major problem develop, refer to the following information for possible causes and corrective steps:
Compressor Won’t Run:
The fuse may be blown or the circuit breaker is open. Check electrical circuits and motor windings for shorts or
1.
grounds. Investigate for possible overloading. Replace fuse or reset circuit breakers after the fault is corrected.
Supply voltage may be too low. Check voltage with a volt meter.
2.
Remote control system may be faulty. Check aquastat for correct wiring, setting and calibration. Check 24-volt trans-
3.
former for burnout.
Wires may be loose or broken. Replace or tighten.
4.
The low pressure switch may have tripped due to one or more of the following:
5.
a. Fouled or plugged coaxial heat exchangers
b. Low or no water flow (source side heating, load side cooling)
c. Water too cold (source side heating)
d. Low refrigerant
The high pressure switch may have tripped due to one or more of the following:
6.
a. Fouled or plugged coaxial heat exchanger
b. Low or no water flow (source side cooling, load side heating)
c. Water too warm (source side cooling)
Check the capacitor.
7.
The compressor overload protection may be open. If the compressor dome is extremely hot, the overload will not reset
8.
until cooled down. If the overload does not reset when cool, it may be defective. If so, replace the compressor.
The internal winding of the compressor motor may be grounded to the compressor shell. If so, replace the compressor.
9.
The compressor winding may be open. Check continuity with an ohm meter. If the winding is open, replace the
10.
compressor.
Insufficient Cooling or Heating
Check aqua-stat for improper location (secondary mode only).
1.
Check for restriction in water flow.
2.
Check subcooling for low refrigerant charge.
3.
The reversing valve may be defective and creating a bypass of refrigerant. If the unit will not cool, check the reversing
4.
valve coil.
Check thermal expansion valve for possible restriction of refrigerant flow.
5.
Noisy Unit Operation
Check compressor for loosened mounting bolts. Make sure compressor is floating free on its isolator mounts.
1.
Check for tubing contact with the compressor or other surfaces. Readjust it by bending slightly.
2.
Check screws on all panels.
3.
Check for chattering or humming in the contactor or relays due to low voltage or a defective holding coil. Replace the
4.
component.
Check for proper installation of vibration absorbing material under the unit. Unit must be fully supported, not just on
5.
corners.
Check for abnormally high discharge pressures.
6.
