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TM 5-4210-220-12
Table 3-1. OPERATOR TROUBLESHOOTING - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
6b EXCESS FOAM FROM TURRET OR NOZZLE
More than one foam proportioning valve open.
Close foam proportioning valve on unmanned station.
7 ROOF OR BUMPER TURRET WILL NOT DISCHARGE
Step 1. Check manual valve in cab roof is open.
Open manual valve.
Step 2. Check pump ON lamp is lit.
Carry out correct operating procedure to start pump, (see para. 2-11).
8 FOAM ENTERING WATER TANK
Check water tank valve is closed.
Close valve.
9 WATER ENTERING FOAM TANK
Check foam tank valve is closed.
Close valve.
10a WINTERIZATION HEATER NOT HEATING
Step 1. Check if heater switched ON.
Set heater switch to ON, check indicator illuminates.
Step 2. Check battery switch in cab set to 1, 2, or BOTH.
Set battery switch to 1, 2, or BOTH.
Step 3. Heater thermal breaker tripped by overheating.
Reset thermal breaker, (see para. 2-12).
3-7
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