TEST OT INSPECTED
5. EXCESSIVELY NOISY OPERATION.
High voltage is used in the operation of this equipment. Death on contact or severe
injury may result if personnel fail to observe safety precautions.
Step 1. Isolate source of noise as near as possible, both by ear and touch. Listen and feel at both front and back
of cabinet. Check all internal components for looseness, vibration, and security.
Tighten, adjust, and secure as necessary.
Step 2. Check fans for looseness or damage. See para 4-37 and 4-44.
Tighten loose fans or replace if damaged. See para 4-37 and 4-44.
6. NO HEAT IN HEHEAT OR EMERGENCY HEAT SETTINGS.
Disconnect input power before performing internal electrical troubleshooting.
Voltages used can be deadly.
Step 1. Check for loose or damaged electrical connectors, or damaged wires in wiring harness. See para 4-23.
Tighten or replace loose or damaged connectors, or repair damaged wires. See para 4-23.
Replace heater thermostat if defective. See para 4-40.