Monessen Hearth DIRECT VENT MLDV500 - Manual (Page 55)

75D0004 55
MLDV Series Gas Fireplace TROUBLESHOOTING
OPERATION
Install batteries and/or
plug in the AC board
Flip the master switch
(rocker switch) to the
ON position
Press the ON button on
the Command Center
FAULT
No beep in about
8 seconds
No beep
or
no sound from the
valve indicating pilot
solenoid open
No sparking on
the pilot
Sparking doesn’t
continue
Pilot doesn’t light
Main burner doesn’t
light
DIAGNOSIS
Make sure
Command
Center and
the control
board are
connected by
a 2 feet or 15
feet cable
Check NG/LP
conversion cap
and control
board
connections
Check pilot
connections
The Control Board is having interference from the
surrounding metal (Ground)
Check gas supply
Go through
Battery polarity wrong?
LED on the Command
Center does not show
solid green?
The 5-pin connector on
the AC board broken or
bent?
AC plug is plugged to
AC mains?
Battery voltage low?
Using
battery?
Check valve
connections
Check power
supply (go
through ) A
E
Check
grounding
Go through
B
Go through C
The sensor on the pilot
is not in the flame
(pilot flame too small)?
ACTION
Re-install batteries
Change batteries
Plug the AC plug to
AC mains
Repair or replace the
AC Board
Replace the AC Board
Replace the Control
Board or
Command Center
Sparking is happening
elsewhere (under the
pilot), re-install/replace
the pilot
Re-install the Control
Board, move it around
or change the
Control Board
Sparking is not in the
path of gas flow, adjust
sparker position or
replace the pilot
Adjust sensor position
or replace the pilot
After the beep
A
B
C
D
E
F
FP1911
troubleshoot sc
8/08
SIGNATURE COMMAND SYSTEM