Table 26 - Alarm List - York YHAU-CW Manual

FORM 155.31-ICOM2.EN.UL
ISSUE DATE: 12/21/2018

TABLE 26 - ALARM LIST

BUTTON LABEL
(ALARM NAME)
• Purge frequency within a set time
exceeded its defined value, therefore chiller
Abnormal Purge
is suspected of poor air-tightness, , or other
Freq. (Abnormal
air leakages.
Purge Frequency)
• Press the ALARM RESET button to clear
the alarm.
• Purge switch was not turned OFF while
Purge Abnormal
automatic purge operation.
(Purge System
• Press the ALARM RESET button to clear
Abnormal)
the alarm.
Low chilled water outlet temperature during
Ch. W. Overcool dilution operation. The dilution operation was
Prevent. (Chilled interrupted (cooling water pump, solution
Water Overcool pump, and refrigerant pump operations were
Prevention Control) suspended). The dilution operation resumes
if the chilled water outlet temperature rises.
Low refrigerant temperature during dilution
Refrig. Overcool
operation. The dilution operation was
Prevent.
interrupted (cooling water pump, solution
(Refrigerant
pump, and refrigerant pump operations were
Overcool Prevention
suspended). The dilution operation resumes
Control)
if refrigerant temperature rises.
HG Hi Press.
HG pressure rose and the load limit
Prevention (HG
operation was activated. The alarm resets if
High Pressure
the HG pressure falls.
Prevention Control)
HG Hi Temp.
High generator solution temperature and
Prevention (HG
load limit operation was activated. The alarm
High Temperature
resets if the HG temperature falls.
Prevention Control)
• Temperature difference between the
absorber temperature and cooling water
Cooling W. Tube inlet temperature widened. Fouling of
Fouling (Cooling cooling water tube inside is likely to be
Water Tube Fouling) accumulated.
• Press the ALARM RESET button to clear
the alarm.
Refrigerant Pump
The Refrigerant Pump Stop button was
Stop (Refrigerant
pressed. The refrigerant pump has been off
Pump Stop Time
for 1 hour or more..
Out)
Cooling water inlet temperature fell down
Low Cool W.
to its lower limit or lower during cooling
Inlet Temp. (Low
operation, and then load limit operation was
Cooling Water Inlet
activated. The alarm resets if the cooling
Temperature)
water inlet temperature rises.
Cooling water inlet temperature rose to or
High Cool. W.
above it's upper limit or higher during cooling
Inlet Temp (High
operation, and the load limit operation was
Cooling Water Inlet
activated. The alarm resets if the cooling
Temperature)
water inlet temperature falls.
JOHNSON CONTROLS
CAUSE OF ALARM AND
CONDITION TO RESET
COUNTER MEASURES
• Purge manually (according to instructions in
SECTION 7 – MAINTENANCE).
• Contact your local Johnson Controls Service Center.
• Check the equipment in cooling load line.
• Check the chilled water flow.
• Check the chilled water flow control system.
• Check the cooling water line.
• Check the cooling water flow rate.
• Check the cooling tower.
• Purge manually (according to instructions in
SECTION 7 – MAINTENANCE).
• Contact your local Johnson Controls Service Center.
• Check the cooling water line.
• Check the cooling water flow.
Press the Refrigerant Pump Auto button.
Check the cooling water inlet temperature control
system.
• Check the cooling water inlet temperature control
system.
• Check the cooling tower.
SECTION 6 – OPERATION
125
6