9
REPLACING THE CONTROL BOX ASSEMBLY
1.
Place the thermistor wire in the locator slot
at the left bottom of the control box.
(Fig. 3-5, INSET)
1.
Slide the new control box assembly into
place in the front half of the front panel.
(Fig. 3-5)
2.
Tabs at each end of the control box
assembly will slide into the wide slots in
the front panel.
3.
Locator pins on the bottom edge of the
con-
trol box assembly fit into slots in
the front
panel.
4.
Replace the two (2) screws securing the
control box assembly to the front panel.
5.
Reconnect the wiring harness connectors
to the control panel wiring plugs.
5. The control box assembly can now be removed from the front panel. Pull it straight up and away
from the front panel.
(Fig. 3-4)
When reconnecting the two power cord connectors:
• Be sure the RIBBED power cord wire is connected to the connector with the single WHITE
wire.
• Be sure the SMOOTH power cord wire is connected to the single BLACK wire.
Failure to do so will result in damage to the electronic control board
and the unit will not operate.
!
NOTE
Fig. 3-4
Fig. 3-5
Locator
Slot
INSET
Wide Slot
at Each
End
16
PROBABLE CAUSE
CORRECTION
PROBLEM
1. Unit does not run.
2. Fan runs - Com-
pressor does not
run.
3. Compressor runs -
Fan does not run
4. No cooling - Com-
pressor and Fan
running
5. Insufficient cooling
- Compressor and
Fan running.
1a. No power to unit.
1b. Low voltage
1c. Failed component or incorrect
wiring.
2a. Incorrect power supply.
2b. Failed components or incorrect
wiring.
3a. Blower wheel or fan blade binding
3b. Incorrect wiring.
3c. Motor windings shorted or motor
shaft stuck.
4a. Air flow restriction
4b. Compressor not pumping.
5a. Improper air flow
5b. Compressor not pumping at full
capacity.
5c. Operating 60 Hz unit on 50 Hz
current.
1a. Check for power at recep-
tacle, good plug contact, fuses
of correct size and time delay
types. (Have customer contact
electrician if no power is avail-
able at receptacle.)
1b. Customer should contact a
qualified electrician to correct
this problem.
1c. Check all wiring and con-
nections, overload, com-
pressor, fan motor, and
capacitor.
2a. Check for proper voltage.
2b. Check all wiring connec-
tions, overloads, compres-
sor, fan motor, capacitors,
etc.
3a. Check for proper clearance.
3b. Check wiring.
3c. Check for open or shorted
motor windings or check for
motor shaft rotation.
4a. Check air flow through con-
denser and evaporator.
4b. Check amp draw, restriction
in sealed system, loss of refrig-
erant.
5a. Clean or replace air filter.
Check for air passage restriction
or obstruction. Check for dirty
condenser, evaporator or fan
blades.
5b. Check amp draw, restriction
in sealed system or loss of re-
frigerant.
5c. Advise customer that the
unit should be operating on a 60
Hz electrical supply.
TROUBLESHOOTING CHART
