Rockwell Automation 20L-LL PowerFlex 700L Liquid-to-Liquid Heat Exchanger - Manual (Page 28)

2-2 Operation
PowerFlex 700L Liquid-to-Liquid Heat Exchanger User Manual
Publication 20L-UM002A-EN-P
PRIME SWITCH Operation The PRIME SWITCH ( Figure 2.1 ) will start the pump independently from
the run state of the heat exchanger.
Operating Status
Indications The STATUS indicator ( Figure 2.1 ) shows the operating status of the heat
exchanger. Table 2.A lists its possible indications.
Table 2.A Heat Exchanger Operating Status Indications (STATUS Indicator)
LED Indication Description Action
Red Steady Internal fault that is non-resettable
(state = internal fault). Cycle power to the heat exchanger.
Replace the controller board.
Flashing
Fast No flow for greater than 10 seconds, and
the run input is active (state = stopped/
fault). The heat exchanger is not ready to
run. Correct the heat exchanger supply
loop fault, and verify that the drive is
properly operating.
Flashing
Slow No flow for greater than 10 seconds
during the previous run cycle, and the run
input is now inactive (state = faulted). The
heat exchanger is ready to run. Restart the drive.
Amber Steady A temperature sensor fault has been
detected. Verify that sensor wires are securely
connected and not damaged.
Replace the sensor if necessary.
Flashing A temperature alarm has occurred.
Causes for the alarm can be:
• Low drive loop coolant level.
Add coolant to the fill line.
Check for drive loop leaks. Replace
the hose and/or connector if
necessary.
• Ambient temperature is greater than or
equal to the alarm temperature set by
S1 DIP switches SW6 and SW7.
Increase the alarm temperature
setting or decrease the ambient
temperature.
• Drive loop coolant temperature is
greater than or equal to the alarm
temperature set by S1 DIP switches
SW6 and SW7.
Increase the alarm temperature
setting.
• Ambient temperature is less than or
equal to 2°C (S2 DIP switch SW3 set
to enabled).
Increase the ambient temperature or
disable the low temperature alarm.
• Drive loop coolant temperature is less
than or equal to 2°C (S2 DIP switch
SW3 set to enabled).
Increase the ambient temperature or
disable the low temperature alarm.
Green Steady The heat exchanger is running, and no
faults or alarms are present
(state = running). No action required.
Flashing
Slow The heat exchanger is ready to run
(state = ready). No action required.
Flashing
Fast The heat exchanger is in a cool down
period following a stop command. No action required.