Table 2-2. Troubleshooting - TM-55-1905-223-24-170047

TM 55-1905-223-24-17

2-12.

Troubleshooting . Table 2-2 lists the common fault conditions that may be found during operation or

maintenance of the equipment. Look for causes and do corrective actions in the order listed. This

manual cannot list every symptom that may show up, and it cannot list all of the possible causes and

corrective actions. If a symptom is not listed, or if it keeps up after you have performed the corrective

actions, notify your supervisor.

Table 2-2. Troubleshooting

Malfunction

Test or Inspection

Corrective Action

HEATING

No heat - no blower running

STEP 1.

Check for power switch OFF or thermostat not properly set.

Turn power switch ON. Set thermostat to required temperature.

STEP 2.

Check for circuit breaker tripped.

Reset breaker. If breaker trips again, check for defective contactor or fan control.

STEP 3.

Check for blown fuse in fused heaters.

Replace as required (paragraph 2-17).

STEP 4.

Check for defective contactor, transformer, or thermostatic switch.

Secure electrical connections as required. Repair broken wires.

Replace defective

contactor, transformer, or switch as required (paragraph 2-17).

STEP 5.

Check for defective fan.

Replace or repair as required.

STEP 6.

Check for defective heater motor on unit space heaters.

Replace heater motor as required (paragraphs 2-22 and 2-23).

No heat - fan/blower running.

STEP 1.

Check for proper thermostat setting.

Set to required temperature.

Not enough heat.

STEP 1.

Check to see if thermostat is set too low.

Set to required temperature.

WARNING

Shock hazard. Wear insulated gloves.

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