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 TM5-4120-383-14
TROUBLESHOOTING-Continued
Table 5-1.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
(See para 5-24.)
Step 9.
Check solenoid valves L1 and L2.
3.
(See para 2-2.)
Step 1.
Check control settings.
Move MODE SELECTOR switch to COOL.
a.
b. Move TEMPERATURE SELECTOR switch to COOLER.
If normal cooling does not resume in 15 minutes,
go to Step 2.
Step 2.
Check air movement.
Remove any obstructions to air flow
a.
(evaporator and condenser sides).
b. Remove, clean, and/or replace air filter.
(See para 4-13.)
c. Remove, clean, and/or replace mist
(See para 4-16.)
eliminator.
d.
Clean evaporator coil.
(See para 4-37.)
NOTE
Frost on the evaporator coil is usually caused
by an obstruction to air flow or dirty coils,
filter, or mist eliminator.
Check actuating cylinder to make sure louvers are
Step 3.
opening.
(See para 5-25.)
Replace if defective.
Check to make sure evaporator and condenser fans
Step 4.
(See para 4-33 and
are tight on motor shaft.
4-36.)
Tighten if loose.
5-7
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