FORM 155.32-ICOM2.EN.UL
SECTION 6 – OPERATION
ISSUE DATE:1/10/2018
JOHNSON CONTROLS
111
Alarm
When an alarm occurs, an audible alarm does NOT sound (buzzer). The type of alarm lights up in the Alarm section of the
screen. To view the details of the alarm and the remedy, press the lighted button (the name of the alarm).
After fixing the alarm, press the
ALARM RESET
button to reset the lighted alarm button. If you press the
ALARM RESET
button before fixing the alarm, the lit alarm button will not go out.
Table 32 -
Alarm List
ALARM NAME
CAUSE OF ALARM AND
CONDITION TO RESET
COUNTER MEASURES
Abnormal Purge
Frequency
Purge frequency within a set time exceeded its defined
value, therefore chiller-heater is suspected of poor air-
tightness.
Alarm is reset via alarm reset.
• Purge manually (according to instructions in
.
• Contact your local Johnson Controls Service Center.
Purge Abnormal
Purge switch was not turned OFF while automatic purge
operation.
Alarm is reset via alarm reset.
Chilled Water
Overcool
Prevention
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.
Refrigerant
Overcool
Prevention
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 is resumed if refrigerant
temperature rises.
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. The alarm is reset via alarm reset.
• Check the cooling water line.
• Check the cooling water flow.
• Contact your local Johnson Controls Service Center.
HG Tube Fouling
Temperature difference between the exhaust gas
temperature and HG temperature widened, therefore fouling
of HG tube inside is likely to be accumulated. The alarm is
reset via alarm reset.
Contact your local Johnson Controls Service Center.
Refrigerant Pump
Stop
The Refrigerant Pump
Stop
button has been pressed for 1
hour or longer while operation command was output.
Press the Refrigerant Pump
Auto
button.
HG Pressure
Prevention
HG pressure rose and the load limit operation was activated.
The alarm is reset when the HG pressure reaches 85.3 kPa. • Check the cooling water line.
• Check the cooling water flow rate.
• Check the cooling tower.
• Purge manually (according to instructions in
.
Contact your local
Johnson Controls Service Center.
HG High
Temperature
Prevention
High generator solution temperature and load limit operation
was activated. The alarm is reset when solution
concentration reaches 316.4°F (158°C).
HG High
Concentration
Prevention Control
High solution concentration and load limit operation was
activated. The alarm is reset after 60 seconds.
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 is reset when the cooling water inlet
temperature rises.
Check the cooling water inlet temperature control
system.
High Cooling Water
Inlet Temperature
Cooling water inlet temperature rose to or above its upper
limit or higher during cooling operation, and the load limit
operation was activated. The alarm is reset when the cooling
water inlet temperature falls.
• Check the cooling water inlet temperature control
system.
• Check the cooling tower.
Recording Sensor
Abnormal
Chilled / hot water inlet temperature sensor, cooling water
inlet temperature sensor, and/or Absorber temperature
sensor detected abnormal value, due to disconnection, short
circuit, or other reasons not noted here. Remote setting
signal was abnormal during remote SP mode (remote chilled/
hot water outlet temperature setting mode). Alarm is reset via
alarm reset after temperature returns to normal.
• Check the remote setting signal.
• Tighten the terminal.
• Contact your local Johnson Controls Service Center.
Low Battery Voltage
Voltage level of the battery in the control board fell down.
Alarm is reset via alarm reset after replacement of the battery
in the control board.
Replace the battery on the PWB.
