21-00-02
Page 21-02
December 1, 1978
1F1
CHART 2101. TROUBLESHOOTING (AIR CONDITIONER)
High discharge pressure. Overcharge of refrigerant. Purge excess refrigerant.
Air in system. Check for leaks. Bleed
charge from system. Evac-
uate and recharge system.
Overheated condenser due Clean bugs and dirt from
to blocking air passage. condenser fins. Straighten
fins if bent.
Flooded evaporator indi- Check that capillary bulb
cated by heavy frosting on is securely clamped to suc
suction line and compressor tion line. If capillary bulb
suction service valve. OK replace expansion valve.
Restriction in liquid line Check for kinked hoses and
from condenser. stopped up filter.
Low discharge pressure. Undercharge of refrigerant. Add refrigerant until bub-
Sight glass shows bubbles bles disappear. Check sys-
or foam. tem leaks.
Damaged compressor Replace compressor.
valves or dirt under valves.
Damaged compressor. Replace compressor.
Worn or broken piston or
piston rings.
Low suction pressure. Low air supply through Repair blower or blower
(Accompanied by icing evaporator. motor. Clean stoppage in
evaporator.) air ducts.
Very dirty evaporator fins Clean and flush with
and coils. water.
Gauge Indication Probable Causes Remedy
PIPER AIRCRAFT
PA-28RT-201 / 201T
MAINTENANCE MANUAL
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