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JOHNSON CONTROLS
123
SECTION 6 – OPERATION
FORM 155.31-ICOM2.EN.UL
ISSUE DATE: 12/21/2018
6
The failures addressed in Failure section of this screen
are:
TABLE 25 - FAILURE LIST
BUTTON LABEL
(FAILURE
NAME)
OPERATION
AT FAILURE
OCCURRENCE
CAUSE COUNTER MEASURES
Chilled W. Time
Out (Chilled
Water Time Out)
Not start
Chilled water pump operation
interlock and/or chilled water
suspension relay was not
established within a set time
while start-up.
• Check the chilled water pump.
• Check the chilled water line.
• Check the chilled water flow.
• Check the chilled water suspension relay.
• Check whether or not the pipe is clogged.
Cooling W. Time
Out (Cooling
Water Time Out)
Cooling water pump operation
interlock was not established
within a set time while start-
up.
Operation
Interlock
Stop after
dilution
Operation interlock was not
established during solution
pump automatic operation. Check interlocked equipment.
CW Pump
Interlock (Cooling
Water Pump
Interlock)
Cooling water pump interlock
was not established during
cooling water pump operation
command output.
Check the cooling water pump interlock.
Monitor Interlock
(Constant
Monitoring
Interlock)
Constant monitoring interlock
was not established.
• Check the components of the constant monitoring
interlock.
• If any of the components are not working, contact
your local Johnson Controls Service Center.
Chilled W.
Suspension
(Chilled Water
Suspension)
Stop without
dilution
Chilled water flow was not
detected continuously during
solution pump automatic
operation.
• Check the chilled water pump.
• Check the chilled water line.
• Check the chilled water flow.
• Check the chilled water suspension relay.
• Check whether or not the pipe is clogged.
Chilled W.
Overcooled
(Chilled Water
Overcooled)
Chilled water outlet
temperature was abnormally
low during cooling operation.
• Check equipment in cooling load line.
• Check the chilled water flow.
• Check the chilled water flow control system.
• Contact your local Johnson Controls Service
Center.
Refrigerant
Overcooled
Low refrigerant temperature
during cooling operation, and
then refrigerant overcool relay
was activated.
• Check the chilled water line.
• Check the chilled water flow.
• Contact your local Johnson Controls Service
Center.
Low Cool. W.
Inlet Temp. (Low
Cooling Water
Inlet Temperature)
Stop after
dilution
Cooling water inlet
temperature had been kept
at its lower limit or lower for
30 minutes or longer during
cooling operation.
Check the cooling water inlet temperature control
system.