Detroit-radiant-products-company QTD Series Manuel d'utilisateur télécharger pdf (Page 38)

QTD Series

Troubleshooting ends.

5.0 Maintenance • Troubleshooting Guide

Do the burners stay on for approx.

15 seconds and then shut off?

Continued from page 36.

Do the burners come on and turn

off immediately (1 to 2 seconds)?

Test for 24V at valve opening period (usually 7 to 10 seconds

after power to heater). Is there 24V to valve for 15 seconds?

Yes

The following can cause the heater to shut down:

• Improper grounding.

• High winds.

• Dirty environment.

• Fluctuating gas pressure.

Do the burners

stay on?

Does the heater stay on

until the call for heat ends?

Yes

Diagnostic Indicator

LED MODE

1 Flash Start up.

2 Flashes Flame. No call for heat.

3 Flashes Ignition lockout.

4 Flashes Valve relay lockout.

Replace circuit board.

Yes

Contact factory.

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Detroit-radiant-products-company QTD Series Manuel d'utilisateur Page 38