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Page Title:
Table 1. Air Conditioning System Troubleshooting Procedures. |
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 TM 9-2320-312-24-1
TROUBLESHOOTING PROCEDURES
Table 1. Air Conditioning System Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. Check if ice has formed on
Allow evaporator coil to defrost
1. AC Compressor Operates Too Often or
Continuously.
evaporator coil.
before resuming operation of
AC system.
2. Check for dirt or debris
Remove dirt or debris from
clogging condenser fins.
condenser fins.
Replace thermostatic
switch
3. Use a multimeter to check
operation of thermostatic
switch.
a. If leaks are found, notify
4. Perform
AC
system
DS
Maintenance
to
inspection and leak test (WP
replace leaking com-
ponent(s).
b. If no leaks are found,
notify DS Maintenance.
2. Little or No Airflow.
1. Inspect air ducts for blockage.
Remove blockage.
2. Ensure heater/AC 25A circuit
Reset circuit breaker.
breaker is not tripped.
Replace failed switch (WP 0055
3. Use multimeter to check
operation of heater/AC fan
switch (WP 0055 00).
Replace failed switch (WP 0093
4. Use multimeter to check
operation of AC ON/OFF
switch (WP 0093 00).
5. Use multimeter to check
Repair or replace any damaged
system wiring.
wiring or connectors (WP 0120
If voltage is present, notify DS
6. Use multimeter to check for
12V at heater/AC unit
Maintenance to replace heater/
connector, located inside cab
AC unit.
behind right side of heater/AC
unit.
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