SERVICE HANDBOOK

ULTRA HIGH EFFICIENCY POWER VENT/POWER DIRECT VENT - SERVICE MANUALFAULT MESSAGES (CONT)DISPLAYED MESSAGECONDITION/INDICATES“Low Igniter Current”The control system has detected less than 2.0 ACamps through the igniter during the igniter warm upperiod.CHECK/REPAIR• Check all wiring between CCB’s J5 Socket(page 35) pins 1 & 2 and the hot surface igniter.Repair/replace anything worn or damaged asnecessary.• Perform close visual inspection of the pinsinside the CCB J5 plug and socket - ensureplugs and sockets are mating properly and providinggood contact. Repair/replace anythingworn or damaged as necessary.• With power turned on and a call for heat active -ensure there is 120 VAC between pins 1 & 2 ofthe CCB’s J5 Socket during the igniter warm upperiod. - the igniter lighting bolt icon will appearon the UIM display during the igniter warm upperiod. See Table 4 on page 30.• Turn off power to the water heater - disconnectwires to igniter at the igniter. Check for continuitybetween the two igniter wires. If the ignitershows to be an open circuit - replace the igniter.• With power turned on and a call for heat active -check amp draw through the igniter with an ACamp meter during the igniter warm up period.This procedure is illustrated and explained onpage 25. Replace igniter if amp draw is lessthan 3.0 AC amps.• Call the technical support phone number shownon the water heater labeling for further assistanceif the problem has not been correctedafter performing the procedures outlined here.Technical Literature Department 49 of 52 Ashland City, TN © 2008Servicing should only be performed by a Qualified Service Agent