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ARMY TM 9-4120-381-14
NAVY EE-000- CA-MMA-010/7053-AC
AIR FORCE TO 35E9-136-31
4-44.
VARISTORS ( VR-1 THRU VR-4 ).
This task consists of: Inspection
Testing
INITIAL SETUP:
Tools
Tool kit, service, refrigeration unit (Item 1, Appendix B)
Personnel: 1
Equipment Conditions:
WARNING
Disconnect input power to the air conditioner before performing any internal maintenance. Voltages
used can KILL. Shutting the unit off at the control panel does not disconnect unit power.
1.
Disconnect air conditioner input power at source.
2.
Open left front evaporator panel (para 4-23).
3.
Remove RFI filter top cover (para 4-42).
INSPECTION
1.
Check varistors for cracks, corrosion, loose electrical connections, and loose mounting hardware (see Figure 4-47).
2.
Check for signs of overheating or other visible damage. Contact General Support Maintenance to replace
varistors.
TESTING
Using multimeter, check varistors continuity (Figure FO-3). If there is no continuity, contact General Support
Maintenance to replace varistors.
4-81
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