York YHAU-CE-JE Series, Установка, эксплуатация и обслуживание, Страница: 123 / 136

JOHNSON CONTROLS
123
SECTION 8 – TROUBLESHOOTING
FORM 155.33-ICOM2.EN.GB
ISSUE DATE:12/4/2017
8
TROUBLESHOOTING PERFORMANCE
ISSUES
If the performance is low while the capacity control
valve is fully open or if the capacity control valve does
not fully open while the load is normal, check numbers
1 through 7 in the following table in order. If the cause
of the trouble is other than numbers 1 to 7, it may be
one of numbers 8 through 14. In this case, contact your
local Johnson Controls Service Center immediately.
TABLE 30 - TROUBLESHOOTING PERFORMANCE ISSUES
ITEM CAUSE COUNTERMEASURE
1 Cooling water temp. is high. Check the performance of the cooling tower.
2 Cooling water is insufficient.
See if the cooling water supply rate matches the specification.
(Check the flow meter, discharge pressure of the cooling water
pump, current, etc.) If the flow rate is low, check the opening ratio of
the flow controller valve and check the strainer for clogging.
3
Cooling water heat exchange tube is dirty. Contact your local Johnson Controls Service Office.
4 Non-condensable gas remains in machine.
• See
Purge Procedure on page 90
.
• Check the performance of the vacuum pump.
• Check the purge unit for a problem. Purge non-condensable
gas from the absorption chiller-heater. If partial-load operation
continues 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 90
. Even if the
automatic purge unit is installed, purge from the lower pressure
side (absorber) manually.
5
Chilled / hot water outlet temperature is not set
properly Set each parameter of the chilled / hot water outlet temperature
controller properly
6 Manual refrigerant blow valves are kept open. Check that manual refrigerant blow valve V2 is fully closed.
7 Refrigerant Pump Stop button is lit. Press the Refrigerant Pump Auto button.
8 Corrosion inhibitor is depleted.
Contact your local Johnson Controls Service Office.
9
Surface active agent is depleted.
10 Refrigerant is dirty (contains solution).
11 Internal cycle control valve is not set properly.
12
Chilled / hot water outlet temperature
controller is broken
13 Solution is crystallized.
14 Air leaks in absorption chiller-heater.