Liebert Challenger 3000

Table 27Excessive arcing in thecanisterOn cold start-up, canisterfills, high water alarmactivates and humidifierfails to reach full amperageOn cold start-up, canisterfills, high water alarmactivates and humidifierfails to reach full amperageTable 28Reheat troubleshootingDrain valve clogged ordefectiveImproper water supplyInsufficient drain rateExcessive iron content inwaterConductivity of water too lowFill solenoid not closing tightlyTroubleshootingVerify that drain valve operates freely when activated. Cleanvalve and replace coil or valve if defective. Flush canisterseveral times and replace if arcing persists.If water is commercially softened, reconnect humidifier toraw water supply, drain canister, and restart If connected tohot supply, reconnect to cold water.Increase drain rate by adjusting % pot on circuit boardabove the preset 70% to roughly 80%.Analyze iron content of water. If it exceeds 0.1 mg./l, installa filter to remove iron from water supply.Drain canister and add one Alka-Seltzer tablet to canister.Refill. Turn the % pot to roughly 60%. Restart humidifier. Ifamperage rises rapidly, it may be necessary to dilute thewater to prevent blown fuses. If it rises too slowly, addanother Alka-Seltzer tablet.If humidifier returns to canister full condition, verity that thefill solenoid closes tightly.Symptom Possible Cause Check or RemedyReheat will not operate;contactor not pulling inReheat not operating;contactor pulling inSteam generating humidifier troubleshooting (continued)Symptom Possible Cause Check or RemedyControl not calling for heatReheat safety stat openHeater burned outCheck monitor status.Jumper between terminals P34-1 and P34-2. If reheat operates,safety is open. Remove jumper. Replace safety.Turn off power and check heater continuity with Ohm meter.NOTE:Reheat element sheaths and fins are manufactured with stainless steel. Regular inspectionsare necessary to assure proper cleanliness of the reheating element. Should inspection revealcorrosion particles on the reheating element or adjoining surfaces (including ducts andplenums), appropriate cleaning should be performed. Periodic reheating element replacementmay be required to meet specific application requirements.63