Liebert XDP160RM 用户手册

Motor Burnout

Check control panel for welded 

contactor contacts or welded 

overload contacts

Replace defective components.

Main 24VAC Fuse Trips

Shorts or loose connections

Check the wiring connections of the 24 VAC circuit.

Faulty circuit board

Replace the circuit board.

Unstable Pump 

Operation

R-134a pump loop overcharged

While pump is running R-134a receiver level must be within 

recommended levels (see Figure 71).

R-134a pump loop undercharged

Filter dryer clogged

See Clogged Filter Dryer and/or Impeller symptom and 

remedy.

Room Becomes

Too Warm

Liebert XDP is Off

Check status of the Liebert XDP at the user interface. Turn 

system On at I/O button if system is Off.

High dew point

Check temperature and relative humidity (RH) of room. Lower 

RH setpoint if necessary to lower dew point. At normal room 

temperature of 68°F (20°C), the RH should be set to 50% or 

lower.

Liebert XD cooling modules are Off

Check Liebert XD cooling modules to make sure that they are 

On before starting the Liebert XDP.

Minimum room temperature setpoint 

is too high

Check the setpoint in the User Setpoints menu (see 

Figure 43).

Temperature/humidity sensors 

incorrectly placed

Place the sensor on the return air side of the primary air mover 

(eg., Liebert DS). Do not install the sensor near unsealed 

doors, windows or similar areas.

Reduced Chilled Water 

Flow Rate

Clogged strainer

Clean or replace strainer

Fouled heat exchanger (no strainer 

installed)

Replace heat exchanger and install 20-40 mess strainer

Increased Refrigerant 

Temperature

Clogged strainer

Clean or replace strainer

Fouled heat exchanger (no strainer 

installed)

Replace heat exchanger and install 20-40 mess strainer