CyberAiR DX Floor Mounted IOM Manual
SYMPTOM
PROBABLE CAUSE
RECOMMENDATION
Condenser Pressure
g. Flow of water/glycol too low. (cont.)
4. Check all strainers and clean if
too High (cont.)
needed.
h. Water/glycol solution not mixed
Remove solution and premix.
prior to adding to system.
Refill system.
Condenser
Pressure too Low
a. Loss of refrigerant (indicated
by bubbles in sight glass).
Locate and repair leak.
Recharge system.
b. Condenser fan controls not
set properly.
Adjust or repair controls.
c. Control pressure set too low.
Readjust to 440 psig.
Noisy Compressor
a. Expansion valve stuck in open
position (abnormally cold suction
line).
b. Worn or scarred
compressor bearings.
c. Liquid slugging.
d. Scroll compressor not
properly phased.
Ensure feeder bulb is tight on
suction line. Check operation and
superheat.
Replace compressor.
System overcharged. Reclaim
excess refrigerant.
Phase correctly at main power source.
DO NOT REWIRE COMPRESSOR.
Compressor Fails to Start
a. Temperature set point too high.
b. Compressor internal
protector is open.
c. Complete loss of refrigerant
charge (low pressure safety switch).
d. Condenser pressure too high
(high pressure safety switch).
e. Minimum off time has not expired.
Adjust to desired temperature.
Check compressor for short circuit or
ground.
Locate and repair leak.
Recharge system.
Check condenser for obstructions.
Wait for time to expire.
System Short of Capacity
a. Low refrigerant (indicated
by bubbles in sight glass).
b. Expansion valve stuck
or obstructed (short
cycling or continuous
running).
c. Clogged drier/strainer (feels cold).
d. Reduced airflow.
Check for leaks. Repair and
recharge system.
Remove valve and clear obstruction
or replace valve.
Replace with new drier/ strainer.
Check fan speed setting, filters
and evaporator coil.
Compressor Short Cycles
a. Low line voltage
causing compressor to
overheat.
b. Dirty or iced-over evaporator coil.
c. Reduced airflow.
Check power source for cause of
low line voltage.
Defrost and/or clean coil.
Check air filters and supply fan
speed setting (when applicable).
4-4
