TM 9-4110-254-14
4-12.
TROUBLESHOOTING. - Continued
h. Pressure Gage (Suction) Indicates Below 0 psi (0 kPa).
ANY VALVES WERE CLOSED, OPERATE UNIT
ABOVE 0 PSI (0 kPa)?
YES
NO
PUT UNIT BACK INTO SERVICE
NOTIFY DIRECT SUPPORT MAINTENANCE TO
CHECK AND ADJUST THE REFRIGERANT CHARGE
IF NEEDED
i.
OBSERVE PRESSURE GAGES. ARE PRESSURES
WITHIN NORMAL OPERATING RANGE?
YES
NO
CHECK AND ADJUST DUAL PRESSURE CONTROL
SEE APPROPRIATE TROUBLESHOOTING
PROCEDURE AS INDICATED
4-28