Viewing the PAK Status Screen
MultiFlex PAK E2 Interface • 27
7.3.2. Compressor Groups
The box left of the middle of the PAK Status
Screen shows the current status of the compres-
sor groups defined for the PAK.
Compressor Group HP/AMPS and Status
Each group from 1 through 8 has a field
showing HP/AMPS, which displays the total
amount of HP or AMPS of all compressors asso-
ciated with the group, and a Status field, which
shows whether the group is currently ON or
OFF.
COMP Mode
The Compressor Group Mode field explains
the current state of the fixed step control algo-
rithm in the MultiFlex PAK. There are seven
messages that may appear here:
•
OFF - No compressor groups are ON, and
none are being called to be ON.
•
Off Delay - The MultiFlex PAK requires less
compressor HP/AMPS, and is trying to cycle
backward through the fixed steps, but PAK is
currently waiting for the fixed step OFF
delay to elapse before moving to the next
lower step.
•
On Delay - The MultiFlex PAK requires
more compressor HP/AMPS, and is trying to
cycle forward through the fixed steps, but
PAK is currently waiting for the fixed step
ON delay to elapse before moving to the
next higher step.
•
DeadBand - The suction pressure is within
the set point dead band. The PAK will
remain on the current fixed step and is not
attempting to move up or down to a new
step.
•
Max Cap - The PAK has cycled through the
fixed steps all the way to the last step, but the
set point is still out of range. In other words,
the PAK would activate more HP/AMPS if
more were available, but it is operating at
maximum capacity.
•
XDucer Fail - The suction pressure trans-
ducer input has failed.
•
Disch Trip - The discharge pressure has
exceeded the discharge trip setpoint, causing
the compressor group to shut down.
Fixed Step
This field shows the number of the currently
active fixed step.
7.3.3. Compressor Status
Because compressor group stages may con-
tain more than one compressor, the center box
shows the status of each individual compressor
in the PAK, along with the compressor group
number assignment.
7.3.4. Condenser Fans
The right side of the PAK Status Screen
shows the current status of the condenser fans.
Fan Stages 1 through 4
If the condenser is using single-speed fan
stages (either by using "Staged Fans" strategy to
control the fan stage relays OR by using "Fan
Sequencer" to control the fan stages through an
analog sequencer), the status of each fan stage
from 1 through 4 will be shown in a box on the
right side of the screen.
VS Fan Status
If the condenser is using variable-speed fans,
the VS % and the state of the VSD Enable relay
will be shown on the right side of the screen. A
VS Fault status will also be shown, which will
display "ON" if the inverter has failed.
Cond Mode
The Condenser Mode field explains the cur-
rent state of the condenser fan control algorithm
in the MultiFlex PAK. There are seven messages
that may appear here:
•
OFF - All condenser fans are OFF, and the
discharge pressure/temperature is low
enough to not require any fans to be acti-
vated.
•
OFF Delay - The PAK is calling for fan
stages to deactivate, and PAK is waiting for
the OFF Delay time period to elapse before
deactivating the next fan stage.
Summary of Contents for MultiFlex PAK
Page 1: ...026 1712 Rev 3 03 JAN 2008 MultiFlex PAK Compressor Condenser Control Board User s Guide...
Page 2: ......
Page 4: ......
Page 8: ......
