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GHND-SVX01A-EN • High Efficiency Propeller Fan Gas Unit Heater 45
Trouble Shooting
• If present, replace main valve; if not,replace S8600 Igniter.
Z. Hi-Limit switch tripping.
POSSIBLE CAUSE(S)
1. Vertical run of flue is too short.
2. Unit is overfiring.
3. Air flow too low
CORRECTIVE ACTION
• Lengthen vertical run of flue pipe (see venting).
• Burner orifice may be too large:verify/replace if required.
• Increase air flow; check fan size.Check for proper voltage.
• Replace.
AA. Noisy power venter.
POSSIBLE CAUSE(S)
1. Power venter wheel loose.
2. Power venter wheel dirty.
3. Power venter wheel rubbing housing.
4. Bearings are dry.
CORRECTIVE ACTION
• Replace or tighten.
• Clean power venter wheel.
• Realign power venter wheel.
• Oil bearings on power venter motor. (Refer to label on motor).
BB. Power venter will not run.
POSSIBLE CAUSE(S)
1. Loose wiring.
2. Defective motor overload protector or defective motor.
3. Defective power venter relay.
CORRECTIVE ACTION
• Check and tighten all wiring connections per diagrams. Thermostat wires tagged
"W" and "G" must be connected together (unless special thermostats are used; if so,
see thermostat wiring diagram). See electrical connections.
• Replace motor.