Service Support System
CPN10XHJ
Page 4 of 7
The set
temperature
only shows on
the display for
a moment
after
adjustment
(where
applicable)
This is normal operation, after
adjusting the temperature the
display reverts to the
temperature value in the room.
N/A
N/A
N/A
N/A
N/A
No cooling,
fans are
running
Verify the thermostat is set for
a value ~ 10 degrees lower
than the room temperature
Verify the air filter is clear
Verify there is nothing
obstructing air flow through the
exhaust kit
Verify the water tank is empty ,
drain the tank if necessary
1. Verify the thermostat
is cycling the unit on and
off properly.
2. Inspect the wiring to
the Control PCB.
3. Verify the unit is
properly charged with
refrigerant
P.C.B.-
CONTROL
BOARD
AC-
5210-
139
N/A
N/A
No Cooling
Fans are NOT
running
Verify the thermostat is set for
a value ~ 10 degrees lower
than the room temperature
Verify the air filter is clear
Verify there is nothing
obstructing air flow through the
exhaust kit
Verify the water tank is empty ,
drain the tank if necessary
1. Inspect the wiring
from the Control PCB to
the evaporator fan motor
and condenser fan
motor.
2. Verify the continuity of
the Overload protector.
3. Verify the continuity of
the compressor
windings.
P.C.B.-
CONTROL
BOARD
AC-
5210-
139
Fan Motor
AC-
4550-
309
