Delta HCH1850 User Manual page 57

Alarm
No.
Information
3 EPO Active
4 Leak Active
5 Fire Active
6 Smoke Active
7 Comm
Abnormal
8 Return/ Supply
Sensor
9 Remote Sensor
1-4
10 Water In Sensor
11 Water Out
Sensor
Possible cause
The EPO button on the
control panel is pressed or
emergency stop is triggered
Emergency stop is
triggered due to leakage
Leakage is detected.
Fire detection is triggered.
Smoke detection is
triggered.
The CAN-Link port wiring
is wrong or the unit ID is
repeated.
The air return/ supply
sensor is abnormal or in
bad contact.
The # remote sensor is
abnormal or in bad contact.
The chilled water inlet
temperature sensor is
abnormal or in bad contact.
The chilled water outlet
temperature sensor is
abnormal or in bad contact.
Elimination method
Eliminate the abnormality, manually reset the
unit by pressing the
for above 3 seconds and re-start the unit to
recover the normal operation.
1) Eliminate the abnormality, make sure the
water leakage detector is dry, and press
the keys simultaneously for above 3
seconds to recover the normal operation.
2) If the water leakage detector cannot be
dried in a short time, go to
'Leak. Cut-Off' function, and follow the
actions mentioned in 1).
Remove the surplus water and inspect the
water level of the condensed water pan.
Inspect if the drain function is normal and
confirm that the condensed water pipe
has no bending, damage or blockage. If
upper piping with condensed water pump
is adopted, the vertical life shall not exceed
Inspect the environment and eliminate the
abnormality.
Inspect the environment and eliminate the
abnormality.
that the cooling units connected in series
have independent and non-repeated IDs.
Inspect the function of the air return/ supply
Inspect the function of the # remote sensor
Inspect the function of the chilled water inlet
Inspect the function of the chilled water
outlet sensor and confirm the wiring is
stable.
53
Chapter 7 Troubleshooting
keys simultaneously
to disable