9.
Fault Finding
R e f e r a l s o t o t h e b u r n e r s u p p l e m e n t s u p p l i e d w i t h t h e h e a t e r
Fault
Cause
Action
Main burner will not light
Electrical
1. Check electrical and gas supplies are ON.
2. Check controls are ON or calling for heat.
Main burner lights, but goes
Electrical
1. Unit goes out on high limit -
out before main fan comes on.
a. Check fan thermostat setting -
See Section
7.6.5.
b. Faulty fan thermostat - change
c. Check limit thermostat setting -
See Section
7
.
6
.
5
.
d. Faulty limit thermostat - change.
2. Faulty fan assembly - change.
3. (Ducted Units Only) -fan motor out on thermal
overload. - Check running amps.
See table 4
.-
check duct resistance
See Table 5
.
Main fan runs continuously
Electrical
1. Summer/Winter switch set to Summer.
2. Fan thermostat set too low - check setting.
See
Section 7.6.5
3. Faulty fan thermostat - change
Main fan fails to run
Electrical
1. Fan motor or capacitor failed - replace.
2. Fan thermostat faulty - replace.
3. Fan contactor failed - replace (3ph units)
10. Short List of Parts
Refer also to the burner supplement supplied with the heater.
R e f e r t o P o w r m a t i c L t d f o r t h e d e t a i l s o f a n y p a r t s n o t l i s t e d h e r e .
ITEM
APPLICATION
PART NUMBER
Johnson Controls GM-7742-3503 - ½"BSP.
100, 150
141379957
Johnson Controls GM-2540-2000 - ¾"BSP
200, 300
141379954
Thermostat - Fan / Limit Honeywell L4064N.
ALL
143000303
Heat Exchanger Cleanout Door Gasket.
ALL
170246006
Pressure Relief Door Gasket - 114mm dia.
ALL
142202110
Pressure Relief Door Gasket - 95mm dia.
ALL
142202257
Pressure Relief Door Gasket - 166mm x 166mm.
ALL
142202310
Burner Gasket - Nu-Way PCGS 2/3/5.
ALL
144704004
Burner Gasket - Riello GS5.
100
141937080
Burner Gasket - Riello GS510
150 - 300
141930806
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