Delta HCH1850, User Manual

Page: 54 / 64

50
InfraSuite RowCool Precision Cooling –
Chilled Water
Chapter 7 : Troubleshooting
WARNING:
7KHIROORZLQJWURXEOHVKRRWLQJDFWLRQVFDQRQO\EHFDUULHGRXWE\TXDOL¿HGVHUYLFHSHUVRQQHO
Unauthorized action may lead to major danger or equipment damage.
System Troubleshooting:
No.
Abnormal
phenomenon
Possible cause Elimination method
1 The fans
cannot start. The power supply
is abnormal. Make sure the input voltage is within the
permissible range, the circuit breaker or
switch is set at
ON , and the cooling unit is
correctly grounded.
The fans are abnormal. Make sure that each fan wiring is normal
and change the abnormal fans if necess-
ary.
2 The cooling unit
cannot start. The input voltage is
abnormal. Make sure the input voltage is within the
permissible range, the circuit breaker or
switch is set at
ON , and the cooling unit is
correctly grounded.
3 Forgot the
password? Forgot the user password
or admin password? Contact service personnel.
4 The operation
noise is too high. Foreign matter is attached
to the fans or the fans’ ball
bearings are damaged. Clean and inspect the fans.
The fan speed is too high. Check 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 pipeline. Inspect the Y-type filter of the external
piping 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
necessary.
6 The alarm condition
LVVDWLV¿HGEXWWKH
buzzer does not
beep.
The buzzer alarm function
is not enabled. Use the control panel to enable the
buzzer alarm function. Path:
Main Menu
ĺ6HWWLQJĺ/RFDO6HWWLQJ .