Vertiv Liebert PEX4 Series User Manual

Vertiv | Liebert PEX4 | User Manual 84
Troubleshooting
5.1.4. Infrared Humidier Troubleshooting
Table 5-4 Diagnosis and Treatment of Infrared Humidifier
Symptom Potential Causes Items to be Checked or Handling Process
Humidication
ineective
No water in water
pan
• Check the water supply.
• Check if the water supply solenoid valve is working.
• Check the state of the high water-level switch and water level regulator.
• Check whether the water supply pipe is clogged or not.
The humidication
contactor does not
close
• Check the opened safety devices of the infrared humidier: Water pan
over-temperature protection switch and lamp over-temperature
protection switch.
• Check the voltage between terminal J18-2 and G on terminal row. If it is
24 V, then check the resistance of protection switch. If the resistance is
very high, then the switch needs to be replaced.
Humidier main
power failure
• Check if the humidier MCB is closed. If humidier contactor closed
state, check whether L1, L2 and L3 voltages are normal.
Infrared humidier
lamp burned
Replace the lamp.
• High-Temp Switch
The manual-reset high-temp switch is tted above the lamps. When overheat occurs due to abnormal situation,
the switch cut-os the power supply to the lamps.
No. Description
1 Reset button
Figure 5-1 Infrared Humidifier Reset Button

Vertiv Liebert PEX4 Series Specifications

General

Brand	Vertiv
Model	Liebert PEX4 Series
Category	Air Conditioner
Language	English