24
Midco International Inc.
8471 95
Special equipment, either factory or contractor installed, may cause variation in the procedures
and descriptions given in this manual.
Consult the OEM’s manual to identify the di
ff
erences in the information.
__________________________________________
The major di
ff
erence for the cUL version of the VA Series is the French / English speci
fi
cation plate
and the
fi
ring valve for the pilot line.
__________________________________________
Make sure the thermostat and operating controls are calling for heat.
CAUTION
: If a test indicates an electrical component may be defective, before replacing
it make sure that its associated wiring is not at fault.
ELECTRICAL AND FLAME CHECKS MUST BE MADE IN THE ORDER LISTED BELOW.
A. MOTOR WILL NOT RUN
1.
Con
fi
rm 120V between strip terminals: ...
for
Honeywell control
- 10 and 6;
for
Siemens control
- 3 and 6;
a. Verify the circuit polarity and electrical ground between strip terminal:
for
Honeywell control
- 10 and burner Ground;
for
Siemens control
- 1 and burner Ground.
b. No voltage: open circuit in operating controls.
c. Voltage present: motor is defective.
2. Check that relay “A” is energized.
3. Check that there is a 2-10 VDC control signal.
B. MOTOR RUNS CONTINUOUSLY, PILOT WILL NOT LIGHT
1.
Con
fi
rm that ALL Main Manual Shut-O
ff
Valves are Open.
2. After pre-purge, if the pilot
fl
ame is not proven within the pilot
fl
ame re-establishing
period, or if the proof of
fl
ame is lost during the burner run and the pilot is not re-
established after the pre-purge, the Ignition Control Module will lock out. RESET
the
120
Volt
fl
ame safeguard.
3. Clogged pilot ori
fi
ce.
4. Pilot regulator mis-adjusted or defective.
5. Defective spark electrode.
6. Defective spark generator.
7. Defective spark wire.
8. Wrong pilot ori
fi
ce.
9. Defective pilot valve.
10. Defective blower air switch.
11. Step down transformer is defective (if applicable).
12.
Insu
ffi
cient pilot
fl
ame sensing signal.
C. PILOT LIGHTS, NO MAIN FLAME
1.
Poor
pilot
fl
ame adjustment.
2. Mis-adjusted main gas.
3
Defective
fl
ame sensing rod or wire.
4. Flame sensing rod mis-located.
5. Pilot regulator vent clogged.
6. Defective main gas valve.
7. Low gas pressure.
8
.
Insu
ffi
cient pilot
fl
ame signal.
D. BURNER DOES NOT LIGHT
1. Refer to page 25 for Siemens Lock/Error Codes
XIV Special
Equipment
(OEM Versions)
XV Canadian
Speci
fi
cations
Trouble Shooting for 120V Burners
g
g
XVI Trouble
Shooting for 120V
Burners
!
A Motor Will
Not Run or Motor
Runs in Repeated
Cycles
B Motor Runs
Continuously,
But no Flame
C Pilot Lights,
No Main Flame
Part 2 Service - and Trouble Shooting 120V Burners
D Direct Spark