TM 10-3510-209-24
Table 2-2. Unit Troubleshooting (Continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
14.
WATER HEATER IS DISCHARGING THROUGH DRAIN TUBE WHILE IN USE.
Check for defective water pressure relief valve.
a.
Replace water pressure relief valve.
b.
If problem persists, notify your supervisor.
15.
WATER HEATER BLOWER IS NOISY.
Step 1.
Check for obstruction of blower.
a.
If blower is obstructed, clean blower or remove obstruction.
b.
If blower is not obstructed, proceed to next step.
Step 2.
Loosen setscrew at fuel pump shaft and check for ease of blower
rotation.
a.
If blower is not easy to rotate, replace blower assembly.
b.
If blower is serviceable and problem persists, notify your
supervisor.
WATER PUMP
16.
WATER PUMP SHAFT FAILS TO ROTATE.
WARNING
High voltage is present on this equipment. Do not perform maintenance with
power on. Death or serious injury may result.
Step 1.
Check for loose electrical connections.
a.
If connections are loose, tighten electrical connections.
b.
If connections are tight, proceed to next step.
Step 2.
Use a multimeter and check for low or no voltage to water pump motor.
a.
If voltage is low or zero, check for tripped power panel
circuit breaker and power source circuit breaker. Reset
breakers.
b.
If voltage is correct and problem persists, notify your
supervisor.
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