ARMY TM 9-4120-380-14
AIR FORCE TO 35E9-136-21
Table 4-2. Unit Maintenance Troubleshooting - Continued
Test or Inspection
LOW SUCTION PRESSURE INDICATOR (DS7) ON
If bubbles are present, contact Direct Support Maintenance.
Feel outlet line of refrigerant strainer (see fig 5-31).
If outlet line is much colder than inlet line, contact Direct Support Maintenance.
Check all piping and connections for leaks.
If leaks are present, contact Direct Support Maintenance.
Check operation of low suction pressure fault relay (K9).
Check operation of relay (K9) socket.
Check operation of slave relay (K12).
If low suction light is still on, contact Direct Support Maintenance.
HIGH DISCHARGE PRESSURE LIGHT (DS6) ON
Go to Malfunction No. 7.
Disconnect input power before performing internal electrical troubleshoot
ing. Voltages used can KILL.
If coil Is exceptionally hot, contact Direct Support Maintenance for refrigeration