Bradford White MI30T*F(BN,CX,SX) Service Manual page 6

National Excelsior Company
www.excelsiorhvac.com
Honeywell Gas Control Troubleshooting Chart
Flammable Vapor Ignition Resistant Water Heaters
Observe green 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
Five flashes and
three second
Thermostat/well sensor fault.
pause
Six flashes and
Water leak detected by accessory
three second
module.
pause
Seven flashes and
Gas Control electronic fault
three second
detected.
pause
Eight flashes and
Standing pilot remains on while set
three second
point knob is in "OFF" position.
pause
6 6
Control Status
Subject to change without notice.
Probable Cause
1. Damage to the temperature
sensor.
2. Temperature sensor resistance
out of range.
Excessive amount of water in drain
pan/water dam.
1. Control need to be reset.
2. Control is wet or physically
damaged.
Pilot valve stuck in open position.
6
Green LED Indicator
Service
Procedure
1. See service
procedure RG-VI
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.