Table 15 Dehumidification Troubleshooting; Table 16 Glycol Pump Troubleshooting; Table 17 Infrared Humidifier Troubleshooting - Emerson Liebert Challenger 3000 Operation & Maintenance Manual

Table 15 Dehumidification troubleshooting
Symptom
No dehumidification
Table 16 Glycol pump troubleshooting
Symptom
Suddenly stops pumping
Suddenly slow pumping
Excessive leakage around the pump
shaft while operating
Performance poor
Noisy operation
Table 17 Infrared humidifier troubleshooting
Symptom
No humidification
Possible Cause
Control not calling for
dehumidification
Compressor contactor not pulling in
Compressor won't run; fuse blown or
CB tripped
Possible Cause
Clogged strainer or impeller
Clogged impeller, diffuser, or line
Worn seal or packing
Worn impeller or seal
Suction lift too high
Motor not up to speed; low voltage
Worn bearings
Worn motor bearings
Low discharge head
Debris lodged in impeller
Cavitating pumps
Possible Cause
Humidifier pan not filling
Control not calling for humidity
Humidity contact not pulling in
Humidifier bulb burned out
59
Troubleshooting
Check or Remedy
Check monitor status.
See 7.5.1 - Compressor Functional
Check and Table 14.
See 7.5.1 - Compressor Functional
Check and Table 14. Check fuses or CBs
and contacts. Check line voltage
Check or Remedy
Clean out debris.
Clean out debris and use strainer.
Replace seal or packing.
Replace with new impeller or seal.
Relocate pump closer to supply.
Larger lead wires may be required. Check
for proper line voltage (±10%).
Replace pump
Replace pump
Throttle discharge-improve suction
conditions.
Remove cover and clean out.
Adjust system pressures.
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.