TM 5-3895-354-14&P
Section C. ELECTRICAL
92. CIRCULATING PUMP MOTOR WILL NOT START Probable Cause
Possible Remedy
Circuit breaker has tripped because of overload
Allow sufficient time for cooling. Reset at circulating
pump motor starter (Fig. 11) Reset main breaker (Fig.
28) Start hot oil heater (Para 13).
Power not connected
Inspect external power source Check continuity of
power lines(Para 10&41)
Voltage too low
Test rating of incoming external power (Para. 10) and
remedy cause of low voltage
Improper power connections
Make the correct connections (Para. 10)
Circulating pump is locked
Replace a defective pump (Para 33)
93. BLOWER MOTOR STARTER OVERLOAD CONTINUES TO TRIP
Probable Cause
Possible Remedy
Blower motor pulling too much amperage
Check amperage at starter
Blower motor starter overload defective
Replace a defective blower motor starter or
overload (Para 44 & 45)
Ambient temperature is above 125F
Open control panel box for ventilation. Shade control
box from direct sunlight
94. BLOWER MOTOR WILL NOT START
Probable Cause
Possible Remedy
Overload has tripped because of overloading
Allow sufficient time for cooling; reset blower motor
starter in control box (Para. 44)
Power not connected
Inspect external power source. Check continuity of
power lines (Para. 10 & 41)
Starter "chatters"
Check reduced voltage transformer for 1 15/1/60
supply; replace faulty transformer
Operating limit open
Check oil level at sight glass, rear of expansion tank,
pressure setting on pressuretrol, and temperature
setting on operating & high limit controls. Overload in
blower starter may be tripped - reset (Para 44)
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