Viking VGR30, Service Manual

Page: 33 / 40

33
TROUBLE SHOOTING GUIDE
PROBLEM PROBABLE CAUSE CORRECTION
12. Intermittent spark or ghost 12A. Lack of or improper ground. 12A.Check ground at outlet. Check
spark (Ghost spark occurs module ground.
when the ignition system is
in the off position at approx-
imately every 20 minutes).
13. Continued reignition on top
13A. Defective spark switch or 13A. Replace switch.
burner. incorrect switch.
13B. Position of spark electrode 13B. Align spark electrode with burner
port.
13C. Lack of or improper ground. 13C. Check ground outlet. Check ground
at the module.
13D. Defective spark module. 13D. Replace spark module.
14. Yellow tipping - produces
14A. Lack of primary air due to 14A. Open air shutter to get rid of the
soot and blocks flueways. incorrect air shutter adjustment yellow tips. CAUTION-too much
primary air will cause lifting, noisy
flames. Balance must be obtained.
14B. Blocked, dirty primary air open- 14B. Clean and readjust burner
ings or blocked burner ports.
14C. An orifice hood out of line will 14C. Align with burner venturi and lube
reduce primary air injection.
14D. Faulty drilling or a dirty orifice. 14D. Clean orifice or replace faulty
drilled orifice.
15. Lifting flames- flames rise
15A. Lifting burner flames results 15A. Reduce primary air.
from the ports to burn some when the flow velocity of air-
distance above the port, also gas mixture from a port exceeds
known as a noisy flame. the flame velocity. (Flame
Velocity -the speed at which a
flame moves through a fuel/air
Mixture.)
16. Fluctuating flame
16A. Normally caused by non 16A. Check gas pressure
Uniform gas pressure. a) supply
b) regulator
16B. Check orifice for blockage.
a) metal shavings
b) dirt or dust
c) excess grease from burner valve.
17. Floating flame-lazy looking,
17A. Lack of secondary air. 17A. Open secondary air inlets.
no well defined inner cone, combustion products
appears to be “reaching” for recirculated in the burner box
air. Normally a strong contaminate the air supply.
aldehyde odor is present. 17B. The appliance may be over- 17B. a) Decrease gas flow rate
(Aldehyde-A class of com- rated. If so the flue outlet area b) check and clear any blockage
pounds which have a pungent, may be too small for the gas found in the fluway.
distinct odor.) rate. c) check for blockage of burners
And clean if necessary.
d) Adjust primary air to get rid of
any yellow tipping which may
have produced soot to block the