21091-0-0606
Page 25
TROUBLESHOOTING
PROBLEM
CAUSES
SOLUTION
Pilot flame does not light up
A) Gas supply valve closed
B) Air in gas pipes
C) Valve does not work properly
A) Open gas supply valve
B) Repeat ignition procedure
C) Place knob on PILOT position and
depress fully
When ignition knob is released, pilot
extinguishes
A) Air remains in gas pipes
B) Dirty pilot
C) Thermocouple is defective
A) Repeat ignition procedure
B) Clean pilot
C) Check with Service Department
Burner burns abnormally
A) Gas supply valve is not fully open
B) Flame lifts when appliance is cold
A) Open gas supply valve fully
B) Keep on MIN. for about 10 minutes
Burner shuts down while in operation
A) Gas supply interrupted
B) Incorrect piping connection
A) Gas supply re-established
B) Connect piping according to installa-
tion instructions
Burner burns with yellow flames
Incorrect piping connection
Connect piping according to installation
instructions
Difficulties in heating room
A) Incorrect heater size
B) Low gas pressure
C) Partially plugged injector
A) Contact Service Department for sizing
room
B) Check with Service Department
C) Check with Service Department
Blue Flame
Correct flame pattern
at high position
Yellow Tips
Incorrect flame pattern
at high position
Incorrect pilot flame pattern
PILOT
IGNITOR
THERMOCOUPLE
Incorrect pattern (no flame)
PILOT
IGNITOR
THERMOCOUPLE
Correct pilot flame pattern
PILOT
IGNITOR
THERMOCOUPLE
Содержание HW075DVN-1
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