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TM 9-4110-257-14
4-12. TROUBLESHOOTING. - Continued
d. Temperature Gage Indicates More Than 15° F (8° C) Above or Below Remote Bulb Thermostat Setting.
TEST REMOTE BULB THERMOSTAT (PARA 4-29) AND
REPLACE IF NEEDED. OPERATE UNIT (PARA 2-5).
DOES TEMPERATURE GAGE INDICATE WITHIN 15° F
(8° C) OF REMOTE BULB THERMOSTAT?
YES
NO
TEST DEFROST TIMER (PARA 4-30) AND REPLACE IF
NEEDED. OPERATE UNIT (PARA 2-5). DOES
TEMPERATURE GAGE INDICATE WITHIN 15° F (8° C)
OF REMOTE BULB THERMOSTAT?
YES
NO
TEST TEMPERATURE SWITCH (PARA 4-36) AND
REPLACE IF NEEDED. OPERATE UNIT (PARA 2-5).
DOES TEMPERATURE GAGE INDICATE WITHIN 15° F
(8° C) OF REMOTE BULB THERMOSTAT?
YES
NO
PUT UNIT BACK INTO SERVICE.
CHECK SETTING AND ADJUST DEFROST TIMER
(PARA 4-30) IF NEEDED.
e.
Pressure Gage Indicates Above 250 psi (1725 kPa).
OPEN ALL REFRIGERATION VALVES (PARA 4-7). IF
ANY VALVES WERE CLOSED, OPERATE UNIT
(PARA 2-5). IS PRESSURE GAGE BELOW
250 PSI (1725 kPa)?
YES
NO
PUT UNIT BACK INTO SERVICE.
NOTIFY DIRECT SUPPORT MAINTENANCE TO
CHECK AND ADJUST THE REFRIGERANT CHARGE IF
NEEDED.
4-36
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