Thermo Products omd-70 service manual V. Dealer Maintenance, A. Troubleshooting

All installations and services must be performed by qualified service personnel.

V. DEALER MAINTENANCE

THIS SECTION IS ONLY TO BE PERFORMED BY TRAINED, QUALIFIED SERVICE PERSONNEL, AND NOT BY THE FURNACE OWNER.

A. TROUBLESHOOTING

Note: Check diagnostic code through view port prior to removing doors.

: When testing electrical equipment, always follow standard electrical procedures and precautions.

1.Check for line voltage (110-120VAC) to the furnace. If there is no line voltage applied to the furnace, check that disconnecting switch is “on”, fuses or circuit breakers have not blown or tripped.

2.Make sure thermostat is “calling for heat”.

3.Check for adequate fuel supply and pressure. Are all the fuel shutoff valves are open?

34