Delta RowCool HCH1CB0, Руководство пользователя, Страница: 53 / 128

Chapter 7 Troubleshooting
4 9
No.
Abnormal
phenomenon
Possible cause Elimination method
4 The operation
noise is too high. Foreign matter is at-
tached to the fans or the
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damaged.
Clean and inspect the fans.
The fan speed is too
high. Check if the unit runs in the force mode or if
the fans are running at full speed. Adjust the
set point or the fan speed accordingly.
There is foreign matter
or impurity in the pipe-
line.
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and clean it if necessary.
5 LCD display is
abnormal and
does not display. The wiring is wrong. Inspect if the wiring of the control panel is
correct or re-start the cooling unit if neces-
sary.
6 The alarm condi-
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does not beep.
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-
tion is not enabled.
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alarm function. Path:
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-
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.
7 The set point
cannot be
reached. The fans are old or ab-
normal. 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.
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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 control module is
wrong.
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The actuator is abnor-
mal. Repair the actuator.
The heaters are abnor-
mal. Inspect the heaters.
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-
mal.
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-
place it if necessary.