Troubleshooting - Schwank 4001-J SERIES Installation & Owner's Manual

8. TROUBLE SHOOTING
WARNING:
THIS SECTION IS FOR CERTIFIED AND LICENSED GAS TECHNICIANS ONLY. IMPROPER
ADJUSTMENTS, BAD MAINTENANCE OR SERVICING PROCEDURES, CAN CAUSE SEVERE
PROPERTY DAMAGE SERIOUS INJURY, OR FATALITIES.
IMPORTANT PROPANE NOTICE:
Propane tanks equipped with the Q.C.C. {quick coupling connector} have an internal excess-flow
valve safety feature to prevent propane from escaping at full pressure if a gas hose is severed.
If the hand wheel on the propane tank is opened too quickly, the excess flow valve could close
causing the propane flow to slow down or stop. The heater will appear to 'burn' properly for a few
minutes, the flame will diminish and finally extinguish. Attempts to relight the heater will fail.
If this occurs: Close the hand wheel on the propane tank and let sit for a few minutes. The excess
flow valve will then reset . Now turn the hand wheel on the propane tank very slowly to prevent
the excess flow valve from closing again. After one complete turn, open hand wheel on propane
tank all the way at normal speed. Heater should now be OK for normal operation.
PROBLEM
Burner will not light
Burner will not stay on
Low Burner Flame
Burner Unit
PROBABLE CAUSE
Gas valve may be in OFF position or fuel
cylinder is empty
Pilot Orifice blocked
Air in supply system
Loose connection
Electronic Igniter 'AAA' Battery Dead
Gas pressure low with valve open full
New cylinder or 1st time start up
Cylinder Valve On, no gas flow
Igniter assembly bent/ or out of
correct position to ignite
Igniter failure
Debris or dirt around the pilot
Loose connections
Thermocouple faulty
Gas leak in the line
Lack of fuel pressure
Cylinder is low on fuel
Pressure is low, or regulator is defective
Gas inlet hose is kinked or bent
Spider or insect cocoon
Carbon on reflector & emitter screen or
Thick black smoke
Turn the gas valve ON or replace LPG gas
cylinder if empty.
Clean or replace orifice
Purge air from lines. Open gas line valve &
depress control knob for approx 2 minutes.
Check igniter lead and fittings.
Check and replace if necessary
Replace cylinder or regulator
Purge air from lines
Is cylinder full/ check regulator /hose assy.
Check set-up and position then retry.
You can light pilot manually with a match or
taper
Clean pilot area
Tighten Connections
Replace Thermocouple
Check connections
Near empty fuel cylinder (LP)
Check regulator (NG)
Check / replace empty LPG gas cylinder.
Check for restricted or plugged orifice.
Replace empty LPG gas cylinder or defec-
tive regulator
Check gas pressure (NG)
Check & straighten out hose for damage
Check for obstructions.
Clean components as needed, check for
probable cause, and rectify
Page 14
SOLUTION
GP-M40J-CX-08A
4001/2-J, 4N11/2-J Manual
RD: April 2006
R.L. 08A
KH