Delta RowCool HCH1CH0 User Manual page 48

Abnormal
No.
phenomenon
The operation
4
noise is too high.
LCD display is
5 abnormal and
does not display.
The alarm
condition is
6
buzzer does not
beep.
The set point
7 cannot be
reached.
InfraSuite RowCool Precision Cooling –
Chilled Water
Possible cause
Foreign matter is attached
to the fans or the fans' ball
bearings are damaged.
The fan speed is too high.
There is foreign matter or
impurity in the pipeline.
The wiring is wrong.
The buzzer alarm function is
not enabled.
The fans are old or
abnormal.
The sensor detection is
abnormal.
The PID parameters are
wrong.
cooling capacity.
The coil is blocked.
is too high.
Error in control module
The actuator is abnormal.
The heaters are abnormal.
Elimination method
Fans should be cleaned and inspected.
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.
piping and clean it if necessary.
Inspect if the wiring of the control panel
is correct or re-start the cooling unit if
necessary.
Use the control panel to enable the
Inspect the fans and change abnormal
ones if necessary.
Check each sensor.
Please refer to 4.7 Setting of PID.
Reduce the heat load or increase cooling
units.
Carry out the coil washing procedures.
Repair the actuator.
Inspect the heaters.
replace it if necessary.
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