Table 27 Humidifier—Infrared Troubleshooting; Table 28 Reheat Troubleshooting - Emerson Liebert Deluxe System/3 DE Operation And Maintenance Manual

Table 26 Humidifier—steam generator troubleshooting (continued)
Symptom
Excessive arcing in the
canister
On cold start-up,
canister fills, high water
alarm activates and
humidifier fails to reach
full amperage after 24
hours
Table 27 Humidifier—infrared troubleshooting
Symptom
No humidification
Table 28 Reheat troubleshooting
Symptom
Reheat will not operate;
contactor not pulling in
Reheat not operating,
contactor pulling in
Possible Cause
Drain valve clogged or defective
Improper water supply
Insufficient drain rate
Excessive iron content in water
Conductivity of water too low
Fill solenoid not closing tightly
Possible Cause
Humidifier pan not filling
Control not calling for humidity
Humidity contact not pulling in
Humidifier bulb burned out
Possible Cause
Control not calling for heat
Reheat safety stat open
Heater burned out
Check or Remedy
Verify that drain valve operates freely when activated.
Clean valve and replace coil or valve if defective.
Flush canister several times and replace if arcing
persists
If water is commercially softened, reconnect humidifier
to raw water supply, drain canister, and restart If
connected to hot supply, reconnect to cold water.
Increase drain rate by adjusting % pot on circuit board
above the preset 87% (85%) to roughly 92% (90%).
Analyze iron cement of water. If it exceeds 0.1 mg/l,
install a filter to remove iron from water supply.
Turn the % pot to roughly 82% (80%). Restart
humidifier. If canister fails to reach FLA in 24 hours,
have water supply conductivity checked.
If humidifier returns to canister full condition, verity that
the fill solenoid closes tightly.
Check or Remedy
Check water supply.
Check fill valve operation
Check drain stand pipe adjustment
Check for clogged waterline
Check monitor status
Check visually. If contact is made, check line voltage
after contactor and fuses or CBs.
Check for open humidifier safety stat. Jumper between
terminals P35-6 and P35-15. If contactor pulls in,
replace safety. Remove jumper.
Replace bulb. Loosen lead on old bulb. Trim excess
lead length on new bulb to avoid shorts.
Check or Remedy
Check 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.
69
Troubleshooting