4-7-4. Locating Alarm and Disposal
List of Alarm Indications with their Causes and Remedies in cooling mode
alarm
Set point
Recovery point
Action
Chilled water low temp.
2.5
o
C or below
above 2.5
o
C
(36.5
o
F)
(36.5
o
F)
Chilled water pump
interlock OFF
interlock ON
Chilled water flow
50% or below
above 50%
Cooling water low temp.
21
℃
or below
above 21
℃
(69.8
o
F)
(69.8
o
F)
for 30 minutes
Cooling water pump failure
Refrigerant low temp.
2.0
o
C or below
above 2.0
o
C
(35.6
o
F)
(35.6
o
F)
Cooling water pump
Cooling water flow
50% or below
above 50%
Generator high temp.
below 105
℃
(221
o
F)
High concentration
No.1 Absorbent pump
No.2 Absorbent pump
Refrigerant pump
Purge pump
Chilled water flow switch
Cooling cycle failure
Power failure
(while operating)
Hot water high temp.
98
℃
or above
below 98
℃
(208
o
F)
(208
o
F)
Operate the chiller after
checking the setting of hot
water temp. If the alarm
occuers again, contact a
service agent.
Flow switch ON
during the chiller
stops
Flow switch
OFF during the
chiller stops
Operate the cooling water
pump after cheking it.
Operate the cooling water
pump after cheking the cause
of alarm. If you can not find the
cause, contact a service agent.
Contact a service agent.
Check other alarms with
▲
key
Contact a service agent.
Check other alarms with
▲
key
If the alarm occurred during
purging, shut the diaphragm
valves immediately.
Rated current
value or above
Contact a service agent.
Check other alarms with
▲
key
above
1.0
o
C(1.8
o
F) .
interlock OFF
105
o
C(221
o
F)
or above
2 times of 65% or
above. 65.5% or
above
Contact a service agent. Check
other alarm with
▲
key
Operate the chiller after
checking the setting of cooling
water temp. If the alarm
occuers again, contact a
service agent.
Stop the cooling water pump.
Contact a service agent. Check
other alarms with
▲
key
Contact a service agent. Check
other alarm with
▲
key
Operate the chilled water pump
after checking the cause of
alarm. If you can not find a
cause, contact a service agent.
More than 1 hour Alarm reset
See chapter 2, 2-4
Reset the
thermal relay
Cooling water
pump ON within
1 hour after the
chiller shutdown
Cooling water
pump OFF
interlock ON
below 65%
Chilled water temp.
difference 1.0
o
C(1.8
o
F)
or below for 30min. at
85% or above input.
This alarm will not occur if
"High temperature hot
water" option is selected.
4-13