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Page Title:
DIRECT SUPPORT TROUBLESHOOTING PROCEDURES - continued |
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 TM 9-4120-430-14
0042 00
FAULT PROCEDURE 1. COMPRESSOR WILL NOT START - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
COMPRESSOR WILL NOT START
Step 3.
Check continuity of compressor motor, and the wiring to motor using multimeter. (Refer to WP
a. Using a multimeter, test for continuity between pins T1 and T2, T2 and T3, and T3 and T1
of the compressor electrical receptacle. Continuity should exist. If not, replace compressor.
b. Check for continuity between pins T1, T2 and T3 and the compressor housing. No
continuity should exist. If continuity exists, replace compressor.
Replace bad compressor or bad wiring. (Refer to WP 0059 00).
Step 4.
Check continuity of HIGH and LOW pressure switches at room temperature. Continuity should
exist. (Refer to WP 0055 00).
If continuity does not exist, press reset button and recheck. Replace faulty HIGH or LOW
pressure switch. (Refer to WP 0055 00.)
Step 5.
For S9160-18KH-3 unit, check power input plugs (P2 or P1 alternate) using multimeter at TB1 as
follows:
Replace power input plug which does not pass test. (Refer to WP 0029 00.)
TB1
CONNECTOR
TERMINAL
PLUG PIN
(See Note)
A
1 or 4
B
2 or 5
C
3 or 6
E
GROUND
A to B should be 208 V ac
B to C should be 208 V ac
A to C should be 208 V ac
A to E should be 120 V ac
B to E should be 120 V ac
C to E should be 120 V ac
NOTE
When making test for voltage and phase reading, TB1 terminals 4, 5, and 6 are used
with P1 alternate plug. Refer to WP 0038 00 schematic diagram.
Step 5.
For S9150-18KH-1 unit, check power input plugs (P2 or P1 alternate) using multimeter at TB1 as
follows:
Replace power input plug which does not pass test. (Refer to WP 0029 00.)
TB1
CONNECTOR
TERMINAL
PLUG PIN
(See Note)
A
1 or 4
B
2 or 5
E
GROUND
0042 00-2
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