VENTILATION (SUPPLY AND EXHAUST FANS)

TM 55-1905-223-24-17

Table 2-2. Troubleshooting - CONT

Malfunction

Test or Inspection

Corrective Action

HEATING - CONT

STEP 2.

Check for low voltage to heater,

Be sure power supply is the proper voltage for the individual heater. Refer to Tables 1-1

thru 1-3 for proper voltage ratings.

STEP 3.

Check filter in air flow source.

Replace as required.

STEP 4.

Check for proper air flow to heater.

Correct as required.

STEP 5.

Check for element failure.

Clean and secure connections.

Replace element (appropriate paragraphs 2-17 thru 2-23).

VENTILATION (SUPPLY AND EXHAUST FANS)

WARNING

Make sure a fan is not in a stalled condition before attempting maintenance.

Severe injury could result if fan operates while being worked on.

Excessive noise or vibration.

STEP 1.

Check for accumulation of dirt or debris on impeller (fan blades).

Clean impeller with rags, soft bristle brush, or vacuum cleaner.

TEP 2.

Check to see if belt is too loose or too tight on V-belt drive fans.

Adjust as required (paragraph 2-25, 2-28, or 2-31).

STEP 3.

Check for belt hitting guard on V-belt drive fans.

Adjust as required (paragraph 2-25, 2-28, or 2-31).

STEP 4.

Check to see if belt is dirty, oily, or frayed on V-belt drive fans.

Clean dirty or oily belt with mild soap and water.

Replace frayed belt (paragraph 2-25, 2-28, or 2-31).

STEP 5.

Check for wrong belt in use on V-belt drive fans.

Replace as required (paragraph 2-25, 2-28, or 2-31).

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