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UDV Series
Observe green LED indicator on
electronic gas control. Status flash
codes are displayed with a three
second pause before repeating.
Check and repair the system as
noted in the troubleshooting table
below.
LED Status
Four flashes
Excessive tank temperature.
three second
System must be reset.
pause
Five flashes
and three
Temperature sensor fault.
second pause
Six flashes
Water leak detected by
and three
accessory module
second pause
Seven flashes
Gas control electronic fault
and three
detected.
second pause
Eight flashes
Standing pilot remains on while
and three
setpoint knob is in "OFF"
second pause
position.
Control Status
Troubleshooting V1
Probable Cause
1. Temperature sensor
out of calibration.
2. Faulty gas control.
1. Damage to the
temperature sensor.
2. Temperature sensor
resistance out of
range.
Excessive amount of
water in drain pan/water
dam.
1. Control needs to be
reset.
2. Control is wet or
physically damaged.
Pilot valve stuck in
open position.
Service Procedure
Replace gas control
Replace gas control
1. Check T&P valve.
2. Check all water fittings.
3. Pressurize and leak test
tank.
1. Reset gas control
2. Replace gas control.
Replace gas control
7
7
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