5-8. COMPRESSOR (CONT)
TOP OF HOUSING
a. Connect suction and discharge pressure gauges to the suction
and discharge service valves.
b. Open suction and discharge service valves.
c. Operate the air conditioner in the cooling mode and verify
that the normal operating pressures are as follows:
Normal Operating Pressures
Outdoor Ambient Temperature
return air to unit
At 80F/67F(26.7C/19.4C)DB/WB return air to unit
d. Stop air conditioner.
e. Close suction and discharge service valves.
f. Remove gauges.
Disconnect input power source before performing this maintenance task.
g. Operate the air conditioner in the cooling mode and using a
internal motor windings at the start relay and selector switch.
h. Verify that the insulation resistance between the windings
and compressor frame is NOT less than 60 megohms.
i . Verify that the insulation resistance of the main winding
(terminal pin A to C) is between .6 and .8 ohms.
j. Verify that the insulation resistance of the auxiliary winding
(terminal pin A to B) is between 5 and 7 ohms.
k. If testing indicates that the compressor is defective, remove
or repair compressor.