JOHNSON CONTROLS
56
FORM 155.21-O1 (615)
OptiView Control Center
Purge Pump Overload Contacts are in conflict
This message occurs when purge pump overload con-
tacts change from closed to open and the pump is not
running. The unit will change purge mode to MANU-
AL if in AUTO, and close the alarm contacts.
Recovery Condition
• Purge pump overload contacts close; releases this
warning but it is required to press WARNING
RESET key in OPERATOR or SERVICE access to
clear the warning.
Purge Pump Overloads Opened
This message occurs when the purge pump overload
contacts changed from closed to open and the pump
was running.
When this condition occurs the unit closes the alarm
contacts, closes 7SOL and 8SOL if open, sets the purge
pump to OFF, stops the purge pump operation counter,
and changes the purge mode to MANUAL if it is in
AUTO.
Recovery Conditions
• Purge pump overload contacts close releases this
warning and enables change to AUTO purge mode,
it is required to press the WARNING RESET key
in OPERATOR or
SERVICE access to clear the
warning.
• Pressing the WARNING RESET key at any moment
opens the alarm contacts.
Purge Pump Service recommended
This message occurs when the purge pump run hours
counter is greater than the Purge pump service interval
setpoint. It is required to press the WARNING RESET
key in OPERATOR or SERVICE access to clear the
message.
Recovery Condition
• Pressing the WARNING RESET key at any moment
will acknowledge the warning and open the alarm
contacts.
Purge Tank Pressure is > 100mmHg
This message occurs when the unit purge tank pressure
(PT4) is greater than or equal to 100mmHgA.
The unit
will close 7SOL and 8SOL, change the purge mode to
MANUAL, stop the purge pump after 65 seconds, and
close the alarm contacts.
Recovery Condition
• Purge tank pressure is less than 100mmHg; it
releases this warning but is required to press the
WARNING RESET key in OPERATOR or SER
-
VICE access to clear the warning.
Purge Transducer PT4 out of range
This message occurs when the purge tank pressure is
less than or equal to 0mmHgA, when this occurs the
alarm contacts will close.
Recovery Condition
• Purge tank pressure is greater than 0mmHgA; it
releases this warning, it is required to press the
WARNING REST key in OPERATOR or SERVICE
access to clear the warning.
Refrigerant from Condenser RT9 or Shell
Pressure PT1 conflict
This message occurs when the condensed refrigerant
temperature sensed by RT9 does not correspond to the
condensing pressure sensed by PT1.
Short dilution cycle and strong solution concentra-
tion control is disabled and dilution occurs upon low
LCHLT cycling shutdown regardless of strong solution
temperature.
Recovery Condition
• Condensed refrigerant temperature corresponds to
Condensing pressure; releases this warning but it
is required to press WARNING RESET key in OP
-
ERATOR or SERVICE access to clear the warning.
Short dilution (if originally selected) is enabled and
strong solution control logic restarted.
Refrigerant Level Switch Conflict - CHK 1F & 3F
This message appears when 3F is open after the re-
frigerant shutdown delay setpoint has been met AND
1F is closed due to the Refrigerant pump startup delay
setpoint being met. This message only applies to units
equipped with Buffalo pumps. This warning does not
modify the state of the machine.
Recovery Condition
• In order to release the warning, the Operator must
press the WARNING RESET key on the control panel
while in OPERATOR or SERVICE level access. 3F
will close when the unit is outside the Refrigerant
pump shutdown delay setpoint.
