Sterling TUBULAR GAS FIRED DIRECT SPARK PROPELLER UNIT HEATERS GG-30 - Manual (Page 38)

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Table 10B - Troubleshooting with LED Indicator Assistance for Honeywell Control Board
Not Applicable
Not Applicable
1. Check pressure switch to see if open to start, if not
replace switch.
2. Air fl ow switch jumpered. Remove jumper and check
operation.
1. Look for obstruction or restrictions in appliance air
intake or fl ue outlet that are preventing proper
combustion airfl ow.
2. Moisture or debris in tube that connects pressure
switch and draft inducer.
3. Check spud on power venter housing. Make sure it is
clear.
1. Open manual reset rollout switch.
2. Gas pressure is too high, over fi red condition.
3. Incorrect airfl ow due to blockage or fan motor not
operating.
1. Flame probe miswired or shorted.
1. Gas supply off or gas pressure too low.
2. Flame sense rod contaminated or loose wire.
3.
Gas valve switch is off or wires are not connected.
4. Broken or cracked porcelain on spark ignitor
allowing spark to jump to ground and not between
end of probes.
1. Open manual reset rollout switch.
2.
Gas pressure too high, over fi red condition causing
high limit to open.
3. Incorrect airfl ow due to blockage or fan motor not
operating.
1. Check pressure from drafter and see if it reads above
set point on pressure switch. Replace bad pressure
switch.
1. Check sensor wire and make sure it is connected
properly.
1. Check for short. If no short replace fuse and start unit.
2. If no short is found, check gas valve for possible over
amp. condition. Replace gas valve.
1. Check transformer for proper voltage. Replace
transformer if not correct.
1. Switch off power and check fl ame rod wiring.
1. Turn unit off and back on. If fault code fl ashes again
check gas valve for problem. If problem found replace
gas valve.
1. Reset board. If code fl ashes again replace board.
Control powered (without call for Heat)
Call for Heat: normal operations
Pressure Switch failed closed
Pressure Switch failed open
Limit circuit open
Flame sensed out of sequence - fl ame still present
Softlockout: Failed to light in four ignition trials
Softlockout: Limit circuit opened during run
(recycle counter at its maximum)
Softlockout: Pressure Switch opened during run; did not
reclose within 2 seconds (fl ame lost and recycle at its
maximum)
Softlockout: Flame failed during run
(recycle at its maximum)
Flame sensed while out of sequence and is now gone
Lockout: Bad fuse detected.
Lockout: Low voltage on 24VAC input
Lockout: Flame Rod shorted to ground or there is a big
leakage from fl ame rod to ground
Lockout: Gas Valve fault
Lockout: Internal Hardware error detected
PATTERN STATUS CHECK/REPAIR
Short Flash
Heartbeat
2
3
4
5
6+1
6+2
6+3
6+4
6+5
7+1
7+2
7+4
7+5
7+6