iom-cliv-cf-eng
www.clima-flex.com
44
Troubleshooting Chart
Problem
Possible causes
Possible corrective actions
The
compressor
does not
work.
Main or compressor disconnect
switch open.
Switch closed.
Damaged fuse, open circuit brakes.
Check the electrical circuit and possible short circuit, line to ground, loss of
connections or motor windings causing the failure. Replace the fuse and reset
the compressor brakes, only after detecting and correcting the cause of the
failure.
Thermal overloads have skyrocketed. Overloads are self-resetting. Check supply voltage, operating amps, cycle
times and mechanical operations. Allow time for automatic reset.
Defective contactor or coil.
Replace.
System shutdown by equipment
protection devices.
Determine the type and cause of the shutdown and correct it before restarting
the equipment. For example, low or high pressure, water freezing, etc.
Does not require refrigeration.
Wait until the unit calls for cooling.
Liquid line solenoid does not open.
Reparar o sustituir el solenoide.
Motor electrical problems.
Check if the motor is open, shorted or bubbling.
Loose wiring.
Check all cable joints and tighten all terminal screws.
The
compressor
is noisy or
vibrates
Compressor running in reverse.
Check that the unit and compressor are on the correct phase of the power
line.
Inadequate piping or supports at
suction or discharge.
Reposition, add or remove hangers.
Compressor insulator bushing worn.
Replace.
Compressor mechanical failure.
Check for possible problem in compressor failure and replace compressor.
Low oil level.
Check the possible problem before it damages the compressor.
Alta presión
de descarga.
Condenser coil dirty.
Clean the coil.
Fan does not work.
Check the electrical circuit and the fan motor.
Fan failure.
Check the electrical circuit and possible problems before replacing the fan
motor.
Fan motor runs in reverse.
Check that the unit and fan motor are properly supplanted by the line voltage.
No or failed condenser caps.
Check or replace the condenser caps on the front and rear of the unit.
No condensables in system.
Remove the non-condensables in the system and replace the charge.
Low suction
pressure.
Dirty evaporator.
Backwash or chemical cleaning.
Lack of refrigerant.
Check for leaks, repair and add necessary charge. Check liquid sight glass.
Low water flow.
Adjust the water flow required for the equipment.
Expansion valve malfunction or
failure.
Check or replace (if necessary) valve and set proper superheat.
Solenoid value not open.
Check circuit and possible problem of solenoid valve not opening, if neces-
sary replace.
Liquid line filter drier fouled.
Check pressure drop or temperature for diagnostics.
Condensing temperature too low.
Check means of regulating condenser temperature.
Excess oil used.
If the system has excess oil, recover and adjust by observing the sight glass
on the compressor.
