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Page 13
XI / Advanced Troubleshooting Guide
System sounds audible
alarm only, display.
Mechanical system has
detected high water level in
the condensate pump.
Inspect condensate pump for
overflow and proper opera-
tion call KwiKool at: 1-800-
594-5665, check condensate
line for clog or crimping.
Resets automatically upon
correction.
Mechanical system has
detected high pressure.
Correct condition with air
flow in or out of the
condenser, inspect/replace
condenser drive belts, check
condenser motor for proper
operation, check condenser
drive (VFD) for trip, reset if
needed. The high pressure
switch requires manual
reset. The pressure switch
is located in the service
compartment on the
compressor discharge line.
Mechanical system has
detected low pressure.
Install service gauges to view
pressure readings below 20
PSI. Check for icing on the
evaporator coil or low return
air temperature. Resets
automatically upon correc-
tion.
KPO red fault light on
control panel is on. Phase
Monitor displays lock out.
“Back Fault” 2 red lights.
A fault has been detected
from one of the unit’s motors.
Inspect motor components
for faulty or loose connec-
tions.
Fault Possible Cause
Possible Solution
Chatter or hum is heard
from the control box while
unit is operating.
Incoming source power is
poor, low voltage component
is faulty
This is not adjustable through
the Phase Monitor, check for
proper voltage switch
selection on 208/230 volt
units and correct incoming
power.
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