Table 27: Failure list
Failure name
Operation at
failure occurrence
Cause
Counter measures
Chilled/Hot Water Time
Out
Chilled/hot water pump operation
interlock and/or the chilled/hot
water suspension relay was not
established within a set time while
in start-up.
•
Check the chilled/hot water
pump.
•
Check the chilled/hot water
line.
•
Check the chilled/hot water
flow.
•
Check the chilled/hot water
suspension relay.
•
Check whether or not the
pipe is clogged.
Cooling Water Time
Out
Cooling water pump operation
interlock was not established within
a set time while in start-up.
•
Check the cooling water
pump.
•
Check the cooling water
line.
•
Check the cooling water
flow.
•
Check the cooling water
suspension relay.
•
Check whether or not the
pipe is clogged.
Ignition Time Out
Not start
Combustion signal was not
established within 3 minutes after
combustion command output,
due to malfunction of air pressure
switch and/or control motor.
Contact your local Johnson
Controls Service Center.
Operation Interlock
Operation interlock was not
established during solution pump
automatic operation.
Check interlocked equipment.
Cooling Water Pump
Interlock
Stop after dilution
Cooling water pump interlock was
not established during cooling
water pump operation command
output.
Check the cooling water pump
interlock.
Model YHAU-CGN/H-CXR(M)Double Effect Direct Fired Small Absorption Chiller-Heater
124
