Page 36 Reznor, PVE, Installation Manual EN 2019-11, D301113 iss D
Probable Cause
Remedy
Burner will not light
1. Main valve not operating
Check voltage on valve during ignition period
Check connector on main gas valve
Check connector on burner relay
Replace valve
2. Air in the gas line
Purge gas line
3. Gas pressure too high or too
low
Supply pressure should be 15 mbar for natural gas (UK only) or 37 mbar
for propane gas (UK only)
Obstruction in the gas line
Gas line connection diameter too small
4. No spark
Check following:
Ensure that all wire connections are solid
Maintain spark gap at 3 mm
Replace worn or grounded spark cable
Replace ceramic spark electrode if cracked or grounded
Check burner relay ground wire
Ensure that unit is properly field grounded (earthed) and properly phased
(L1 to hot lead,
L2 to neutral)
5. Combustion airs pressure
switch not closing upon power to
venter and reset lamp is burning
If voltage is available to burner relay and all other causes have been
eliminated, replace burner relay
Check following in order:
Ensure that unit is properly vented
Remove obstructions from vent
Replace faulty tubing to pressure switch
Burner cycles on and off
1. Gas pressure too high or too
low
Supply pressure should be 15 mbar for natural gas (UK only) or 37 mbar
for propane gas (UK only)
2. Burner relay not grounded
Check burner relay ground wire connection
3. Faulty burner relay
If (220/240) volts is available to burner relay and all other causes have been
eliminated, replace burner relay
4. Flame sensor grounded
Ensure that flame sensor lead is not grounded or insulation or ceramic is
not cracked;
5. Cracked ceramic at sensor
replace as required
Replace sensor
6. Incorrect polarity
Check polarity switch and if necessary reverse line voltage wires to terminal
block connections
Burner or venter motor turns on and off while burner is operating
1. Motor internal thermal
protection device cycling on and
off
Check motor load against motor rating plate; replace motor if needed
Table 17b : Trouble shooting
