User Guide
36
TROUBLESHOOTING
LEDStatus ControlStatus ProbableCause
None(LEDnotonor
flashing)
Electricalpowernot
present.
Controlpowerswitchin“OFF”position.Supply
voltageinteruppted.
Oneshortflashevery
fourseconds
Stand‐bymode,
Thermostatis
satisfied(nofaults).
Temperaturedemandissatisfied(nocallforheat).
Alternatesbrightand
dim(Heartbeat)
Thermostatcalling
forheat(nofault).
Tanktemperaturebelowsetpointofthermostat.
Shortflashonce
everysecond
Weakpilotsignalon
lastcallforheat.
1.Unstablepilot.
2.Pilottubeblockorrestricted.
3.Oxidationbuilduponpilotelectrode.
4.Wiredamagetopilotassemblyorbad
connection
atgasvalve.
Shortflashonce
everytwoseconds
Idleremote
commandoff
1. ControlputinidleorSabbathmodefrom
accessorymodule
Twoflashes,three
secondpause
Pressureswitchnot
working‐closed
position.
1.Pressureswitchtubingkinkedorblocked.
2.Blockedpressuretaponswitch.
3.Faultypressureswitch.
Threeflashes,three
secondpause
Pressureswitchor
blowertemperature
switchnotworking‐
openposition.
1.Ventblockageorimproperventconfiguration.
2.Pressureswitchtubingkinkedorblocked.
3.Blowernotspinninguptospeed.
4.Venttemperaturetoohigh
5.Faultypressureswitchorventlimitswitch.
Fourflashes,three
secondpause
Excessivetank
temperature.
Systemmustbe
reset.
1.Excessivesediment
2.Hotwaterenteringthetankfromanother
sourceinthepotableloop.
3.Faultygasvalve.
Fiveflashes,three
secondpause
Falsepilotflame
present.
1.Pilotvalvestuckinopenposition.
Sixflashes‐oneflash,
threesecondpause
(Softlockout)
Failedtolightpilot.
Systemautoresets
after5minutes.
1.Unstablepilot.
2.Pilottubeblockedorrestricted.
3.Oxidationbuilduponpilotelectrode.
4.Wiredamagetopilotassemblyorbad
connectionatgasvalve.
Sixflashes‐two
flashes,threesecond
pause(Softlockout)
Pressureswitchor
blowertemperature
switchopened
duringburner
operation.
Systemautoresets
after5minutes.
1.Pressureswitchtubingkinkedorblocked.
2.Ventblockageorimproperventconfiguration.
3.Ventterminationbeingaffectedbywindy
conditions.
4.Blowernotspinning
uptospeed.
5.Venttemperaturetoohigh
6.Faultypressureswitchorblowertemp.switch.