User Guide

FLAME CURRENT
5 69-1180—1
Fig. 3. Test harness connected to
adapter and digital voltmeter.
Table 2. Hot Surface Ignition (HSI) SmartValve System Flame Current.
a
The SmartValve® control is not likely to be the cause of low readings. Investigate the flame rod location and gas sup-
ply. Also check for contamination on the flame rod, obstructed or damaged orifices, improper combustion air flow,
poor electrical connections and damaged wiring.
b
A steady flame current reading at the required minimum levels means there is enough flame current to maintain the
main flame. A typical appliance, even under less than optimum operating conditions, should readily generate at least
twice the required minimum levels. If the flame current generated by the appliance is less than twice the minimum
reading, investigate further and take any necessary action.
DIGITAL VOLTMETER
M21021
TEST
HARNESS
SIGNAL
CONVERTER
V
COM
SmartValve
Model
Meter Reading
(10 seconds after main
flame lights) System Status Recommended Action
SV9410, SV9420,
SV9510, SV9520,
SV9610, SV9620
None Main flame does not light
during trial for ignition.
Check for the following:
• Gas supply off or low inlet gas
pressure.
• Excessive inlet gas pressure that
keeps valve from opening.
• HSI element damaged or broken.
• HSI element out of position.
• Main burner orifices incorrect.
None Main flame lights but goes
out at the end of trial for
ignition.
Check for the following:
• Line voltage supply polarity
incorrect.
• Appliance not properly earth-
grounded.
• Low inlet gas pressure.
• Flame rod contamination.
• Flame rod out of position.
• Flame sense wiring damaged.
• Replace control if all other factors
are good.
Less than 1.1 microampere
or less than 110 mV
Main flame stays on after
trial for ignition.
Check for the following:
• Low inlet gas pressure.
• Flame rod contamination.
• Flame rod out of position.
• See footnote
b
.
More than 1.1 microampere
or more than 110 mV.
Main flame stays on after
trial for ignition.
See footnote
a
.