McQuay WSC Operating Manual page 70

Operation
LED Display
• View parameters, messages and faults.
• Shows software revision on power up.
Programming
Press PARAM to enter the menu and
•
then UP or DOWN to reach the desired
parameter.
Press ENTER to show the present value
•
of the parameter.
Press UP or DOWN to change the
•
parameter value.
Press ENTER to store the new value or
•
PARAM to abandon the change.
Quick Meters
Press DOWN to display the motor
•
thermal overload content.
Press UP to display the incoming line
•
phase order.
Press ENTER to display the status
•
meter.
View Parameters
Parameter view mode can be entered by:
1. At the default meter display, press the PARAM key to enter parameter mode. "P 1" will
2. Use the UP and DOWN keys to scroll through the available parameters.
3. Pressing the UP key from "P 1" will advance to parameter "P 2".
4. Pressing the DOWN key from "P 1" will wrap around to the highest parameter.
5. The value of the parameter can be viewed by pressing the ENTER key.
6. To view another parameter without changing/saving the parameter, press the PARAM
To return to the default meter display either:
Set Parameters
The starter setpoint parameters are factory set and subsequently reviewed during commissioning
by the McQuay startup technician. They should not be changed unless authorized by McQuay.
The programming procedure is explained above and the following table shows the range of values
and defaults.
Improper setting of parameters can cause compressor damage or nuisance trips
70
be displayed to indicate Parameter 1.
key to return to the parameter number display.
1. Press the PARAM key while in the parameter number display mode.
2. Wait 60 seconds and the display will return to the default meter display.
Fault Log
• Press PARAM, Select P24 and press
ENTER. The most recent fault will be
displayed as "xFyy" where x will be 1
to indicate the most recent fault is
being displayed and yy is the fault
code.
• Press DOWN to view older faults. Up
to 9 faults may be stored in the log.
Resetting a Fault
• First correct the cause of the fault.
Then press RESET to reset from a
fault.
Resetting Parameters
• Press and hold PARAM and ENTER on
power up to reset parameters to
default values.
Emergency Thermal Reset
Press RESET and DOWN to perform an
•
emergency thermal reset.
CAUTION
OM Centrif Micro ΙΙ-5