7
SECTION THREE
COMPONENT ACCESS
Component Location
Compressor
Dual
Capacitor
Condenser
Fan Blade
Control
Assembly
Control
Panel
Evaporator
Fan Blade
Fan
Motor
Evaporator
Condenser
Fig. 3-1
Strainer
(In bottom tube
behind return
bend)
18
PROBABLE CAUSE
CORRECTION
PROBLEM
8. Noisy operation
9. Evaporator frosts
up
NOTE: 90% frosting of evapo-
rator is normal under low-am-
bient, high humidity conditions
and 70% ice blockage is to be
considered normal.
NOTE: Initial start-up on rotary
compressor equipped units
may cause frosting on the first
2 or 3 evaporator passes (for
approximately 20 minutes) un-
til refrigerant is driven out of the
oil by heating.
10.
Remote control
does not oper-
ate
unit.
8a. Loose parts
8b. “Ping” noticed as fan hits drops of
water in air stream
8c. Mounting area not firm
8d. Compressor could be overloaded
due to high ambient temperatures
or air flow restriction
8e. Fan motor
9a. Low outside air temperature
(below 65°F)
9b. Thermistor failed
9c. Improper air flow
9d. Fan motor slow
10a. Batteries dead
10b. Remote failed
8a. Check fan blades, cabinet,
washers, tubing contact or vibra-
tion, loose screws, etc.
8b. Normal operation
8c. Add support kit or improve
installation
8d. Loose internally, inadequate
lubrication, improper voltage
8e. Fan blades loose or hitting,
bad bearing or out of balance
9a. Instruct customer that op-
eration at ambient temperatures
below 65°F is not considered a
normal requirement of the unit.
Adjust controls to warmer set-
ting.
9b. Check thermistor location
(see pg. 19) and response to
temperature change by sub-
merging it in ice water (compres-
sor should cycle OFF) or hold-
ing it in your closed hand (com-
pressor should START). If re-
sponse is O.K., instruct cus-
tomer.
9c. Clean or replace air filter.
Check for obstructed or re-
stricted air passage. Check for
dirty evaporator or condenser
coil. Check for dirty blower
wheel, loose seals or missing
from back of front panel.
9d. Check for binding of fan
blade, blower wheel or motor
bearings. Using low fan speed,
instruct customer.
10.a. Check that unit operates
manually at control panel. If it
does, replace batteries in re-
mote.
10b. Replace remote control.
TROUBLESHOOTING CHART
