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Page 14
Control Displays E1 Appears when up or down
key is pressed when not in
programming mode.
Operate in program mode.
If E1 appears when no keys
are pressed.
Evaporator coil is freezing. Low or restricted air flow.
Undersized capacity, unit
constantly on, unable to
achieve set point. Low
return air temperature out of
factory specifications.
Service door open or off,
mechanical system malfunc-
tion.
Review duct engineering,
direct return air duct to area
of highest heat load,
replace air filters, adjust set
point to allow unit to cycle,
add more KwiKool units or
capacity, close service
compartment door. Install
service gauges to view
pressures.
Control displays E2 Appears when control
settings are not properly
stored in memory.
Check all settings and
correct if necessary.
Control displays EP Appears when the probe is
open, shorted or sensing a
temperature that is out of
range.
Check to see if the sensed
temperature is out of range.
If not, check for probe
damage by comparing it to
a known ambient tempera-
ture.
Control displays EE Appears if the EEPROM
data has been corrupted.
Control must be replaced.
Call KwiKool at:
1-800-594-5665.
Hot air exhaust fan
(condenser fan) stops and
the High Pressure Switch
trips while the compressor is
operating.
Condenser drive has
detected a fault with the
incoming electrical power or
is not receiving an operating
signal.
Check condenser motor
drive (VFD) for trip, reset if
needed. Write down the
displayed fault code on the
drive and call KwiKool at
1-800-594-5665 if the
problem persist.
Fault Possible Cause Possible Solution
Control displays CL Appears if calibration mode
has been entered.
Remove power to the
control for at least 5
seconds. Reapply power
and if CL message still
appears, control must be
replaced. Call us at
1-800-KwiKool
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