Midco Unipower MPG Series - Manual (Page 15)

A. Poor flame signal
B. Poor pilot flame
C. Misadjusted pilot regulator
D. Low gas pressure
E. Misadjusted air shutter
F. Defective flame rod wire
G. Defective or Mis-adjusted flame rod
H. Defective amplifier
I.
Defective flame safeguard
A. Low gas pressure
B. Mis-adjusted main regulator
C. Blocked regulator vent
D. Defective main regulator
E. No power at main valve(s)
F. Blocked main valve bleed line (if equipped)
G. Defective main valve(s)
H. Closed test cock
I.
Defective flame safeguard
A. Poor pilot
B. Pilot gas pressure drops severely when main gas valve opens
C. Mis-adjusted pilot regulator
A. Low gas pressure
B. Defective main regulator
C. Mis-adjusted main regulator
D. Too much air
E. Partially closed test cock
A. High gas pressure
B. Defective main regulator
C. Mis-adjusted main regulator
D. Too little air
E. Dirty blower wheel
A. Defective valve(s)
B. Defective valve actuator
C. Dirty valve seat
A. Low voltage
B. Defective motor
C. High ambient temperature
D. Dirty blower wheel
A. See IV above
B. See V above
C. See VI above
Note: Some of the probable causes listed above apply only to certain models as indicated,
therefore some may not apply to your particular case.
15
VI Pilot Lights,
o Lockout on
Flame Safeguard,
o Main Gas
VIII Short Main Flame
VII Main Flame
Lights, But Goes out,
Pilot Re-lights
XI Motor Overload
Frequently Trips Out
XI Flame Safeguard
eeds Frequent
Re-setting
X Main Valve(s) Fail
to Shut Off or Leaks
IX Long Hazy Flame
V Pilot Lights,
Flame safeguard
Locks Out
Midco International Inc. 4140 West Victoria Street * Chicago, Illinois 60646
tel 773.604.8700 fax 773.604.4070 web www.midcointernational.com email [email protected]
909
8471 51
Part 2 Service