York YHAU-CW - Abnormal Solution and Refrigerant Levels

JOHNSON CONTROLS
163
SECTION 8 – TROUBLESHOOTING
FORM 155.31-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
wrong, correct it according to the following procedure.
TABLE 46 - ABNORMAL SOLUTION REFRIGERANT LEVELS
SECTION
NORMAL
CONDITION
ABNORMAL
CONDITION
CAUSE COUNTERMEASURE
Refrigerant
Overow
(G101)
High temperature of
cooling water inlet
temperature.
• See if the cooling water supply rate is conformed to
the specication. (Check the ow meter, discharge
pressure of the cooling water pump, current, and other
relevant water gauges) If the ow rate is low, check the
opening ratio of the ow controller valve and check the
strainer for clogging.
• Check the capacity of the cooling tower.
• See Purge Procedure on page 132.
• Check the capacity of the vacuum pump.
• Check the purge unit for trouble.
• Purge air from the absorption chiller. If partial-load
operation is continued for a long period, non-
condensable gas tends to stay in the absorber. In
this case, purge directly from the low pressure side
(absorber), see Purge Procedure on page 132.
Low temperature of
chilled water outlet
temperature.
Cooling water tube
fouling
Purge trouble
Air leakage
Refrigerant
Tank
(G102)
Cooling water inlet
temperature is low.
Setpoint error of
automatic start and
stop switch.
• Check cooling water inlet temperature .
• Check the setpoint.
Solution
Tank
(G103)
Purging is insufcient. See Purge Procedure on page 132.
Adjusting valve
opening setting error.
Contact your local Johnson Controls Service Center.
Solution is
crystallized.