FORM 155.21-O1 (615)
63
JOHNSON CONTROLS
2
Solution Pump Overloads Opened
Solution pump motor protector overload or thermal
switch contacts opened and the pump was running.
Recovery Conditions
• If the chiller was in RUN status at the time of the
event and the event was the first such event since
last start: When the overload contacts close, the
unit performs dilution and then if the unit switch is
taken to STOP/RESET position the chiller becomes
ready to start.
• If the event was not the first solution pump over
-
load event since last start, the control activates the
safety shutdown “SOLUTION PUMP OVERLOAD
TWICE- CHK FOR CRYST”.
• If the chiller was not in RUN status at the time of
the event, when the overload contacts close, and the
unit switch is placed to STOP/RESET position the
chiller becomes ready to start.
Solution Pump Overload Twice -
Chk for Cryst
This safety shutdown occurs when the solution pump
overload contacts recover the second time since the unit
was started. The unit is set in stand by safety shutdown
condition.
Recovery Condition
• After it has been determined that crystallization has
not occurred, the unit can be restarted. To restart
the unit, press the UNIT switch to the STOP/RESET
position, then press the WARNING RESET key in
SERVICE access and then initiate a start.
Equipment Status Messages
Chilled Liquid Pump has been stopped after 2
hours of Operation
The chilled liquid pump was manually started with the
chiller not running and the 2 hour run limiting timer has
expired. The pump run contacts are opened automati-
cally by the control. This message resides until the unit
switch is taken to RUN or the WARNING/RESET key
pressed in OPERATOR or SERVICE access.
Condenser Pump has been stopped after 2
hours of Operation
The condenser pump was manually started with the
chiller not running and the 2 hour run limiting timer has
expired. The pump run contacts are opened automati-
cally by the control. This message resides until the unit
switch is taken to RUN or the WARNING/RESET key
pressed in OPERATOR or SERVICE access.
Control Valve Calibration in Progress
Applies to unit set up for digital control valve. This
message displays while the control center is performing
a valve calibration procedure.
Control Valve Calibration is Successful
Applies to unit set up for digital control valve. This
message displays for 60 seconds after the completion
of a control valve calibration procedure.
Disabled Warnings have been Erased
Status messages that were able to clear have been cleared
using the WARNING/RESET key. This message resides
for 60 seconds after the reset command is issued.
Generator Pump has been Stopped
after 2 hours of Operation
The generator (Franklin pump units) pump was manually
started with the chiller not running and the 2 hour run
limiting timer has expired. The pump is stopped auto-
matically by the control. This message resides until the
unit switch is taken to RUN or the WARNING/RESET
key pressed in OPERATOR or SERVICE access.
Manual Dilution Prohibited
Manual dilution process not be started at this time due
to equipment or status conflict. This message resides for
60 seconds after the failed manual dilution command
is issued.
