Cyclone User Manual
28
c) 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 repair or thawing.
FAULT
POSSIBLE CAUSE
POSSIBLE SOULTION
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, check for proper
voltage selection, and correct
incoming power.
Evaporator coil is freezing in
cool mode.
Low or restricted air flow. Filter
blocked, unit constantly on,
unable to achieve set point.
Low return air temperature out
of factory specifications. Service
door open or off, mechanical
system malfunction.
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 KwiKool
system, close service compartment
door, Install service gauges to view
pressures
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, reset by
disconnecting power and restarting. If E1
fails to clear, control must be replaced.
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 temperature
Control displays EE
Appears if the EEPROM data has
been corrupted.
Control must be replaced Call 1-800-
KwiKool
Control displays CL
Appears if calibration mode has
been entered.
Remove power to the control for at
least 5 seconds. Reapply power. If the
CL message still appears, Control must
be replaced Call 1-800-KwiKool.
