Piper Lance II - Page 557

LANCE
II
SERVICE
MANUAL
TABLE
XIV-IV.
TROUBLESHOOTING
CHART
(AIR
CONDITIONER)
Gauge
Indication
Probable
Causes
Remedy
High discharge pressure.
Overcharge of re-
frigerant.
Purge excess
refrigerant.
Air in system.
Overheated
condenser
due to blocking air
passage.
Flooded
evaporator
indicated by heavy
frosting on suction
line and compressor
suction
service
valve.
Restriction in liquid
line from condenser.
Check
for
leaks. Bleed
charge
from
system.
Evacuate and recharge
system 14-13 and 14-14.
Clean bugs
and
dirt
from condenser fins.
Straighten fins if bent.
Check
that capillary
bulb is securely
clamped to suction
line. If capillary
bulb
OK replace
expansion valve.
Check for kinked hoses
and stopped up filter.
Low discharge pressure.
Undercharge of re-
frigerant. Sight glass
shows bubbles or foam.
Add refrigerant until
bubbles disappear. Check
system leaks 14-7, 14-10
and 14-11.
Damaged
compressor
valves or dirt under
valves.
Damaged compressor.
Worn or broken piston
or piston rings.
2L5
Replace compressor,
14-18.
Replace compressor,
14-18.
ACCESSORIES
AND UTILITIES
Issued: 1/3/78