TM 9-4110-254-14
a. Refrigeration Unit Does Not Start.
IS POWER SOURCE CONNECTED AND ACTIVE?
YES
NO
PLACE CIRCUIT BREAKER IN ON POSITION,
ACTIVATE POWER SOURCE OR NOTIFY UNIT
TOGGLE SWITCH (START/RUN, OFF) IN
MAINTENANCE TO CONNECT REFRIGERATION
START/RUN POSITION, AND PRESS RESET
UNIT TO POWER SOURCE.
BUTTON (COMPRESSOR OVERLOAD). DOES
REFRIGERATION UNIT START?
YES
NO
CONTINUE WITH NORMAL OPERATION. IF
ARE SIDE DOORS CLOSED?
CIRCUIT BREAKER OR RESET BUTTON
(COMPRESSOR OVERLOAD) TRIP AGAIN, NOTIFY
UNIT MAINTENANCE TO TEST OR REPLACE IT AS
NECESSARY.
YES
NO
OPEN RIGHT SIDE DOOR PRESS THE
CLOSE SIDE DOORS.
DIFFERENTIAL OIL PRESSURE SWITCH AND DUAL
PRESSURE CONTROL SWITCH RESET BUTTONS.
CLOSE SIDE DOOR. IF DIFFERENTIAL OIL
PRESSURE OR DUAL PRESSURE CONTROL SWITCH
TRIPS AGAIN, NOTIFY DIRECT SUPPORT
MAINTENANCE. IF REFRIGERATION UNIT DOES
NOT START, NOTIFY UNIT MAINTENANCE.
b. Thermometer Indicates More Than 15F (7C) Above Remote Bulb Thermostat Setting.
IS THE REFRIGERATION UNIT RUNNING?
YES
NO
CHECK READINGS ON PRESSURE GAGES IF
START REFRIGERATION UNIT (PARA 2-5).
READINGS ARE ABOVE OR BELOW NORMAL
OPERATING RANGE, SEE APPROPRIATE TROUBLE
SHOOTING PROCEDURE. IF THE INDICATED
TEMPERATURE IS STILL NOT WITHIN RANGE,
NOTIFY UNIT MAINTENANCE.
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