IBC Technologies SL 20-115 Installation And Operating Instructions Manual
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Contents
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5-7TROUbLESHOOTINGSL 20-115 MODULATING GAS bOILERSYMPTOM DIAGNOSIS REMEDYvENT HI-LIMIT ERRORLCD Screen Message:Error - Vessel/Vent High-LimitExceeded *** Call for service!Vent temperature has exceededthe vent limit switch or theupper vessel high limit hasbeen tripped. Boiler in lockout.Consult service technician.Indicates one or bothswitches has tripped.• Check wiring to ensure switches are properlyconnected to control module.• Check for evidence of any damage to ventsystem and signs of excess heat nearswitches.• Push manual reset button(s), maintainconstant watch during boiler operationto evaluate vent/cabinet temperatures atmaximum operating settings. ensure nounsafe condition exists, e.g. max flue temp.or heat escapement at the burner flange.TEMPERATURE SENSORERRORLCD Screen Message:Error - Max. In-Out Temp.Exceed. -> Check water flowWater temperature signalnot within acceptable range.Potential flow or sensor failure.Consult service technician.Current outlettemperature exceedsoperating limit.• Check water flow.Defective ordisconnectedtemperature sensor.• Check wiring to temperature sensor andcontrol module.• Check temperature sensor. See Section5.2.1.MISCELLANEOUSLCD Screen Message :Blank – screen dark, but fanrunning Indicative of power-surge damage to appliance• Check transformer; replace if damaged.• Check circuit board for visible damage.5.3.2 Ignition ProblemsSYMPTOM DIAGNOSIS REMEDYNOISY SPARK WHENIGNITINGIgnition lead is notfirmly connected.reconnect ignition lead.Contaminants/moisture on igniterprobe/flame sensor.ensure probe is dry by re-running post-purge;otherwise, clean or replace igniter probe.bOILER RUMbLES WHENIGNITING.Fluctuating gaspressure/ gaspressure too high/toolow.Check Co2 level via analyzer.Check for proper gaspiping.Check pressure with manometer during ignition. |
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