JOHNSON CONTROLS
122
FORM 155.30-ICOM2.EN.UL
ISSUE DATE: 12/21/2018
SECTION 6 – OPERATION
TABLE 26 -
ALARM LIST
BUTTON LABEL
(ALARM NAME)
CAUSE OF ALARM AND
CONDITION TO RESET
COUNTERMEASURES
Abnormal Purge
Freq. (Abnormal
Purge Frequency)
•
Purge frequency within a set time exceeded
its defined value, therefore chiller is
suspected of poor air-tightness.
•
Press the
ALARM RESET
button to reset the
alarm.
•
Purge manually (according to instructions shown in
).
• Contact your local Johnson Controls Service
Center.
Purge Abnormal
•
Manual Purge
OFF
button was not pressed
during an automatic purge operation.
•
Press the
ALARM RESET
button to reset
the alarm.
Chilled W. Overcool
Prevent. (Chilled
Water Overcool
Prevention Control)
Low chilled water outlet temperature during
dilution operation, and then dilution operation
was interrupted (cooling water pump, solution
pump, and refrigerant pump operations were
suspended). The dilution operation resumes
when the chilled water outlet temperature
rises.
• Check the equipment in cooling load line.
• Check the chilled water flow.
• Check the chilled water flow control system.
Refrig. Overcool
Prevent.
(Refrigerant
Overcool Prevention
Control)
Low refrigerant temperature during dilution
operation, and then the dilution operation
was interrupted (cooling water pump, solution
pump, and refrigerant pump operations were
suspended). The dilution operation resumes
when the refrigerant temperature rises.
Gen. Hi Temp.
Prevent. (Generator
High Temperature
Prevention Control)
Generator solution temperature rose to its
upper limit or higher. The load limit operation
was activated. The alarm resets when the
generator solution temperature drops.
• Check the cooling water line.
• Check the cooling water flow rate.
• Check the cooling tower.
•
Purge manually (according to instructions shown in
).
• Contact your local Johnson Controls Service
Center.
Gen. Hi Press.
Prevent. (Generator
High Pressure
Prevention Control)
Generator pressure rose, then load limit
operation was applied. The alarm resets if the
pressure falls.
• Check the cooling water line.
• Check the cooling water flow rate.
• Check the cooling tower.
•
Purge manually (according to instructions shown in
).
• Contact your local Johnson Controls Service
Center.
Cooling W. Tube
Fouling (Cooling
Water Tube Fouling)
Temperature difference between the
absorber temperature and cooling water
inlet temperature widened, therefore fouling
of cooling water tube inside is likely to be
accumulated. Press the
ALARM RESET
button to reset the alarm.
• Check the cooling water line.
• Check the cooling water flow.
Refrigerant Pump
Stop
The refrigerant pump switch was set to OFF
for one hour or longer while the operation
command was output.
Press the Refrigerant Pump
Auto
button.
Low Cool. W.
Inlet. Temp. (Low
Cooling Water Inlet
Temperature)
Cooling water inlet temperature fell to its
lower limit or lower during cooling operation,
and then load limit operation was activated.
Alarm resets when the cooling water inlet
temperature rises.
Check the cooling water inlet temperature control
system.
