51
Chapter 7 Troubleshooting
No.
Abnormal
phenomenon
Possible cause
Elimination method
7
The set point
cannot be reached.
The fans are old or
abnormal.
Inspect the fans and change abnormal
ones if necessary.
The sensor detection is
abnormal.
Inspect the sensors.
The PID parameters are
wrong.
Refer to
4.7 PID Setting
.
The heat load exceeds
the cooling capacity.
Reduce the heat load or increase cooling
units.
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The coil is blocked.
Carry out the coil washing procedures.
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temperature is too high.
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the chiller (5~15 degrees are ideal).
The control module is
wrong.
Repair or replace the control box.
The actuator is abnormal.
Repair the actuator.
8
There is a water
stain in the cabinet.
The humidity is too high.
Use an external de-humidifier to control
the data center’s humidity or enable
the force mode to reduce the internal
humidity of the data center.
The inlet water
temperature is too low.
Adjust the water supply temperature of
the chiller (5-15 degrees are ideal).
The fan speed is too low.
Adjust the fan speed.
The drain pump is
abnormal.
Confirm the functions of the drain pump
are normal.
The piping is abnormal.
Inspect if the chilled water pipeline and
other pipelines are normal.
9
There is water
leakage at the
cabinet bottom.
The condensed water
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O b s e r v e i f t h e w a t e r l e v e l i n t h e
condensed water pan is too high, inspect
the condensed water pump or make
sure the condensed water pipe (without
bending, damage or blockage) is correctly
connected and the draining is normal.
If upper piping with condensed water
pump is adopted, the vertical lift shall not
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Содержание HCH1850
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