Liebert 3000 manual Reheat troubleshooting, Troubleshooting

Troubleshooting

Table 27 Steam generating humidifier troubleshooting (continued)

Symptom	Possible Cause	Check or Remedy
	Drain valve clogged or	Verify that drain valve operates freely when activated. Clean
		valve and replace coil or valve if defective. Flush canister
	defective
		several times and replace if arcing persists.
		If water is commercially softened, reconnect humidifier to
Excessive arcing in the	Improper water supply	raw water supply, drain canister, and restart If connected to
canister		hot supply, reconnect to cold water.
	Insufficient drain rate	Increase drain rate by adjusting % pot on circuit board
		above the preset 70% to roughly 80%.
	Excessive iron content in	Analyze iron content of water. If it exceeds 0.1 mg./l, install
	water	a filter to remove iron from water supply.
On cold start-up, canister		Drain canister and add one Alka-Seltzer tablet to canister.
		Refill. Turn the % pot to roughly 60%. Restart humidifier. If
fills, high water alarm
	Conductivity of water too low	amperage rises rapidly, it may be necessary to dilute the
activates and humidifier
		water to prevent blown fuses. If it rises too slowly, add
fails to reach full amperage
		another Alka-Seltzer tablet.
On cold start-up, canister		If humidifier returns to canister full condition, verity that the
fills, high water alarm	Fill solenoid not closing tightly
activates and humidifier		fill solenoid closes tightly.
fails to reach full amperage

Table 28 Reheat troubleshooting

Symptom	Possible Cause	Check or Remedy
Reheat will not operate;	Control not calling for heat	Check monitor status.
		Jumper between terminals P34-1 and P34-2. If reheat operates,
contactor not pulling in	Reheat safety stat open
		safety is open. Remove jumper. Replace safety.
Reheat not operating;	Heater burned out	Turn off power and check heater continuity with Ohm meter.
contactor pulling in

NOTE:

Reheat element sheaths and fins are manufactured with stainless steel. Regular inspections are necessary to assure proper cleanliness of the reheating element. Should inspection reveal corrosion particles on the reheating element or adjoining surfaces (including ducts and plenums), appropriate cleaning should be performed. Periodic reheating element replacement may be required to meet specific application requirements.

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