Johnson Controls York YHAU-CGH-CXR Series, Установка, пусконаладка, эксплуатация и обслуживание.

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Table 41: Chilled or hot water time out or cooling water time out
Item Cause Countermeasure
1 Pump abnormal Check the water pump.
2 Insufficient water flow
• Check the water line.
• Check the water flow.
3 Water suspension relay abnormal
• Check the water suspension relay.
• Check to see if the pipe is clogged.
4 Water pump interlock abnormal Check the water pump.
Table 42: Pump interlocks
Item Cause Countermeasure
1 Water pump interlock was not established Check the water pump interlock.
Table 43: Low cooling water inlet temperature
Item Cause Countermeasure
1
Cooling water inlet
temperature control
system is abnormal
Check the cooling water inlet temperature control system. If this problem occurs,
the absorption chiller-heater performs the dilution operation automatically and then
stops. Go to the Control Center immediately to confirm that the dilution took place. If
it did not, dilute the solution according to the procedure shown in Manual refrigerant
blow down and diluting method .
If these problems occur, the absorption chiller-heater performs the dilution operation and then
stops. Go to the Control Center immediately and confirm that the dilution took place. If it did not
take place, dilute the solution according to the procedure shown in Manual refrigerant blow down
and diluting method .
Table 44: Abnormal control sensor
Item Cause Countermeasure
1 contact failure tighten terminal in control panel
2 sensor abnormal or disconnected
3 inductive noise
contact your local johnson controls service office.
Table 45: CPU abnormal
Item Cause Countermeasure
1 control board malfunction contact your local johnson controls service office.
In the case of chilled/hot water suspension, the absorption chiller-heater does not dilute the
solution, but stops immediately. If the absorption chiller-heater is left as is, the solution can
crystallize in 4-5 hours. To prevent this, dilute the solution according the instructions shown in
Manual refrigerant blow down and diluting method .
Table 46: Chilled or hot water suspension
Item Cause Countermeasure
1
Chilled/hot water pump has a
problem.
Check the chilled/hot water pump for a problem.
2
Chilled/hot water flow rate is
low.
• Check to see if the chilled/hot flow rate is below the setpoint of the water
suspension switch. If it is low, check the flow controller, check the strainer
for clogging.
• Check the opening ratio of the flow control valve.
175 Model YHAU-CGN/H-CXR(M)Double Effect Direct Fired Small Absorption Chiller-Heater