TM-9-2350-311-10 M109 Operator's Manual for M109A2, M109A3, M109A4 and M109A5 Download
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TM 9--2350--311--10 3--8 Change 6 3--4 TROUBLESHOOTING — CONTINUED MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION PERSONNEL HEATER (GLOBAL A20) 12.A NO PERSONNEL HEATER OPERATION, NO FAULT LAMP OPERATION, NO DIAGNOSTIC CODE DISPLAY Step 1. Check MS power connection. Tighten connector. Step 2. Restart heater. Step 3. If problem still exists, notify unit maintenance (NO PERSONNEL HEATER OPERATION, NO FAULT LAMP OPERATION, NO DIAGNOSTIC CODE DISPLAY). 12.B C3, VENT FAN FAULT Step 1. Check for frost or obstruction in vent fan. Remove frost or obstruction. Step 2. Start personnel heater. Step 3. If problem still exists, notify unit maintenance (C3, VENT FAN FAULT). 12.C E1, LOW VOLTAGE Step 1. Check for loose cable connection. Tighten loose cable connection. Step 2. If problem still exists, notify unit maintenance (E1, LOW VOLTAGE). 12.D E3, LOW BURNER AIR FLOW Step 1. Check exhaust for restrictions. Remove restriction from exhaust. Step 2. Check for combustion air restriction. Remove combustion air restriction. Step 3. Restart personnel heater. If problem still exists, notify unit maintenance (E3, LOW BURNER AIR FLOW). 12.E F1, IGNITION OVERTIME Step 1. Check fuel supply. Add fuel if necessary. Step 2. Restart heater. Step 3. If problem still exists, notify unit maintenance (F1, IGNITION OVERTIME).