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Page Title: 4-44. VARISTORS ( VR-1 THRU VR-4 ).
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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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