Montigo MD34 BV - Manual (Page 11)

Page 11 XG0305
MD34-BV Homefire
Maintenance
Troubleshooting
If your fireplace still does not operate correctly, consult your dealer or
the manufacturer.
All service and repairs should be performed by a qualified
agency.
All spare parts, optional fans (see optional fan instruction guide), and
optional trim finishes are available from the manufacturer or your local
dealer.
HONEYWELL SV 9500 /SV9600
Troubleshooting Sequence
noTE: Before Troubleshooting, Familiarize Yourself With
The Startup And Checkout Procedure.
· TurnGasSupplyoff
· Setthermostatto
call forheat
SV9500/SV9600
ispowered
(24VaCnominal) NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
START
Igniterwarmsup
andglowsred.
PilotValveopens.
Turngason.
PilotBurnerlights?
MainValveopens?
SYSTEMoK
unplugPilotBurnerCable,
MeasureVoltageat
SV9500/SV9600HSI
Terminals(24VaC
nominal, SeeInSET)
ReplaceIgniter/
FlameRodassembly.
ReplaceIgniter/
FlameRodassembly.
ReplaceSV9500/SV9600
MeasureVoltagetoSV9500
/SV9600. Voltagemust
beatleast19.5VaC
DiscardoldIgniter/
FlameRodassembly.
ReplaceIgniter/Flame
Rodassemblyandretain.
RestartTroubleshooting
Sequence. Doesmain
valveopen?
Replace
SV9500/
SV9600
Check
Transformer
LineVolt
Supply
Replace
SV9500/
SV9600.
Saveold
Igniter/Flame
Rodassembly
forservice.
INSET
HSI
Terminals
CHECK:
· Linevoltagepower
· Lowvoltage transformer
· LimitController
· Thermostat
· Wiring
· airprovingswitchon
combustionairblowersystem
· Ventdamper(ifused) isopen
andendswitchmade
Gas Control Valve
Pilot Burner Adjustment
1. Locate Pilot Adjustment Screw. (See figure 12.)
2. Adjust pilot screw to provide properly sized flame as shown in
figure 13).
3. After installing or servicing, leak test with a soap solution with
main burner on. Coat pipe and tubing joints, gasket etc. with soap
solution. Bubbles indicate leaks. Tighten any areas where the
bubbles appear until the bubbling stops completely.
MD34-BV-I
Figure 13. Pilot Burner
Troubleshooting
The following is a troubleshooting chart of possible problems:
PROBLEM CORRECTIVE ACTION
Noisy Pilot Flame Locate pilot adjustement screw on gas
control valve. Flame is decreased by
turning adjustment screw clockwise.
Pilot won’t ignite Disconnect remote wires and try to
light pilot. If pilot now works, remote
connections are faulty. Check wiring
diagram
figure 12.
Main burner will 1. Check wiring ( see figure 12).
not light 2. Check wall switch for proper con-
nection.
MD34-BV
Figure 12. Sit Nova 820 gas valve.
Manifold Pressure
Test Connection
Pilot Adjustment Screw
Vent Safety Switch
Inlet
Pressure
Power
Generator
Thermocouple
Connection
Wall Switch
T P
-T
H
T
P
T
H