JOHNSON CONTROLS
161
SECTION 8 – TROUBLESHOOTING
FORM 155.30-ICOM2.EN.UL
ISSUE DATE: 12/21/2018
8
ABNORMAL SOLUTION AND REFRIGERANT
LEVELS
Causes of abnormal levels of solution and refrigerant
and countermeasures against them are shown in the
table below. If the level of the solution or refrigerant
is abnormal, correct it according to the following pro-
cedure.
TABLE 46 -
ABNORMAL SOLUTION AND REFRIGERANT LEVELS
SECTION
NORMAL
CONDITION
ABNORMAL
CONDITION
CAUSE
COUNTERMEASURE
Refrigerant
overflow
G101
Cooling water
temperature at inlet is
high.
•
See if the cooling water supply rate matches the
specification. (Check the flow meter, discharge
pressure of the cooling water pump, current
and other applicable gauges or pumps). If the
flow rate is low, check the opening ratio of the
flow controller valve and check the strainer for
clogging.
• Check the capacity of the cooling tower.
• See
.
• Check the capacity of the vacuum pump.
• Check the purge unit for trouble.
•
Purge air from the absorption chiller. If partial-
load operation continues for a long time, non-
condensables gas tends to stay in the absorber.
In this case, purge directly from the low pressure
side (absorber). See
Chilled water temperature
at outlet is low.
Heat exchange tube is
dirty.
Purging is insufficient.
Air leaks in absorption
chiller.
Refrigerant
tank G102
Automatic on/off
temperature switch is not
set properly. The cooling
water inlet temperature
is low
.
•
Check set value of automatic on/off temperature
switch 23AS.
• Check the cooling water inlet temperature.
Solution
tank G103
Purging is insufficient.
See
Internal cycle control
valve is not set properly. Contact your local Johnson Controls Service
Center.
Solution is crystallized.
