KPO PORTABLE AIR CONDITIONERS KWIKOOL
23
Mechanical system has de-
tected low pressure.
Install service gauges to view pressure read-
ings below 20 psi.
Check for icing on the evaporator coil or low
return air temperature. Resets automatically
upon correction.
KPO control displays PH
phase monitor displays
lock out back fault.
A fault has been detected
from the load side of a com-
ponent circuit.
Inspect components for faulty or loose connec-
tions.
Chatter or hum is heard
from the control box
while unit is operating.
Incoming source power is
poor, low voltage compo-
nent is faulty.
This is not adjustable thru the phase monitor.
Check for proper voltage selection on 208/230-
volt units, and correct incoming power. Isolate
low voltage controls to find faulty component.
Evaporator coil is freez-
ing in cool mode.
Low or restricted air
flow.
Undersized capacity,
unit constantly on, una-
ble to achieve set point.
Low return air tempera-
ture out of factory speci-
fications.
Service door open or
off.
Mechanical system mal-
function.
Review duct engineering.
Direct return air 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 A1, if
equipped.
Appears when Input from
A1 is opened.
Fault detected from A1 input, confirm usage,
and call 1-800-KWIKOOL if input code is not
used but is displaying.
Control displays A2, if
equipped.
Appears when Input from
A2 is closed.
Fault detected from A2 input, confirm usage,
and call 1-800-KWIKOOL if input code is not
used but is displaying.
Appears when Input from
FD is engaged. This occurs
when the Condenser VFD
has a fault.
Check VFD and all condenser fan and motor
components including belts and pulleys.
Control displays FL If
applied.
Appears when the time set
for filter change has
elapsed.
Check condition of air filters, replace as needed.
Reset time for filter change. Found in technical
settings.
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