Table 4-2. Organizational Troubleshooting-Continued.

5-4120-386-14

MALFUNCTION

TEST OR INSPECTION

CORRECTWE ACTION

5. INSUFFICIENT HEATING-Continued

Step 7. Check that each heater element has approximately 115 Volts AC across

it. Disconnect power from unit. If heater element does not have 115

volts AC across it, check continuity of heater elements. (Refer to

If no continuity exists, replace heater elements.

Check that heater relay is energized and correct contacts are closed

Step 8.

when in HIGH HEAT mode using continuity tester and applying 30 volts

DC across Xl and 2X terminals. See schematic diagram.

Replace bad relay. (Refer to paragraph 4-25.)

Step 9. Check that output of rectifier is 24-28 volts DC when 30 volts AC is

applied across input terminals of rectifier.

Replace bad rectifier. (Refer to paragraph 4-28.)

Step 10. Check that output of transformer's 33-36 volts AC is applied across

input terminals of transformer.

Replace bad transformer. (Refer to paragraph 4-29.)

Check that continuity exists on heater cutout switch between

Step 11.

terminals 1 and 2, and elements 3 and 4.

Replace bad heater cutout switch.

4-18