Monitor 441 - INDICATION OF FAILURE MODE

MONITOR HEATING SYSTEMS
Section 6: Troubleshooting
lNDlCATlON OF FAILURE MODE
- - - - -- - - - -
Digital Display The Reason of Indication Trouble Point
/ // / At pre-purge, Flame rod is sensing flame Flame senslng clrcult grounded
C L/ / when there should be none. flame rod or p~nched wlre
After power on, power supply to the micro- Timer clock circuit bad or power
11 17 r
/
processer timing circuit is incorrect.
source to
unlt above or below
L L/ -.
acceptable levels.
At starting of operation; the circuit to drive Solenoid Pump control circuit
- I/ /-
Relay RL6 of Solenoid Pump is mal- has a malfunction.
functioning.
-
1 When unit is shut off either manually or Driving circuit of RL6 or excess
: I- r I
: ,'- I' I- j automatically, flame rod does not detect fuel in burner pot.
'- 1 '- I
' flame out within 300 seconds.