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Observe LED indicator on gas control. Error 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
Not on and/or
Pilot flame may not be present.
not flashing
One flash and a three
Gas control is in the "PILOT" position and
second pause.
the pilot flame is detected.
Gas control has recently been turned to the
LED is on continuously
"OFF" position. Wait until LED goes out
before attempting to relight.
Two flashes and a three
Weak pilot flame detected. System will reset
second pause.
when pilot flame is sufficient.
Three flashes and a
Tank temperature fault.
three second pause.
System will reset.
Four flashes and a three
Excessive tank temperature.
second pause.
4
Troubleshooting Chart
For Models Using Honeywell Gas Control
Control Status
LED Indicator
Probable Cause
Pilot flame is not present.
Gas control is powered and waiting for the set
point knob to be turned to a water
temperature setting.
Gas control was turned to the "OFF" position.
1. Thermopile failure
2. Unstable pilot.
3. Pilot tube blocked or restricted.
Thermowell sensor out of calibration.
Thermowell sensor out of calibration.
Page 4
Service
Procedure
1. Lite pilot per the instructions
located on the lighting
instructions label or the
lighting instructions located in
the installation and operation
manual.
2. See Service
Procedure AG-I,
Page 7.
Normal operation. Adjust gas
control set point knob to
desired temperature level.
1. Wait for LED to go out.
2. Lite pilot per the instructions
located on the lighting
instructions label or the
lighting instructions located in
the installation and operation
manual.
1. See Service
Procedure AG-I,
Page 7
2 & 3. See Service
Procedure AG-II,
Page 10.
1. See Service
Procedure AG-III,
Page 16
1. See Service
Procedure AG-III,
Page 16
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