Specifications

68
JOHNSON CONTROLS
Form 201.28-NM1.EN.PED/CE (0211)
MICROPANEL
VSD DATA KEY
General
The VSD DATA key provides the user with displays
of VSD temperatures, voltages, currents, and other
operating data. This key has multiple displays, which
can be seen by repeatedly pressing the VSD DATA or the
▲ or ▼ (Arrow) keys. An explanation of each message
is provided below.
VSD Data Key Operation
The first VSD DATA key press displays the actual VSD
Output Frequency and Command Frequency.
VSD FREQUENCY ACTUAL = XXX.X HZ
COMMAND = XXX.X HZ
The second key press of the VSD DATA key or the ▼
(ARROW) key displays the calculated compressor %
FLA and measured motor currents in amps for systems 1
and 2. When measuring motor current keep in mind that
measuring inverter PWM current is difficult and meter
error can be significant.
VSD COMP 1 = XXX AMPS = XXX %FLA
COMP 2 = XXX AMPS = XXX %FLA
The next key press displays the current limit values set
locally on the panel under the PROGRAM key, remotely
by an ISN, and remotely by the Current Limit input.
Any current limits that are inactive will display “XXX”
instead of a numeric value.
VSD CURRENT LIMIT LOCAL = XXX %
ISN = XXX REMOTE = XXX %
The next key press displays DC Bus voltage.
VSD DC BUS VOLTAGE = XXX VDC
The next key press displays the Control Panel/VSD
Internal Ambient Temperature and VSD Cooling Pump/
Fan Status. YYY will indicate ON or OFF.
VSD INTERNAL AMBIENT TEMP = XXX.X °F
COOLING SYSTEM STATUS = YYY
The next key press displays the IGBT highest baseplate
temperature.
VSD IGBT BASEPLATE TEMPS T1 = XXX.X °F
T2 = XXX.X °F
The next key press displays the state of the Precharge
signal, where XXX is either ON or OFF.
VSD PRECHARGE SIGNAL = OFF
The next key press displays the setting of the VSD’s
105% FLA overload potentiometer for Compressor #1
and 2. The settings are determined by the adjustment
of the overload potentiometers on the VSD Logic
Board. These pots are factory set and should not require
changing unless the circuit board is replaced.
VSD COMP 1 MOTOR OVERLOAD = XXX AMPS
COMP 2 MOTOR OVERLOAD = XXX AMPS
OPERATING HOURS / START COUNTER KEY
Compressor operating hours and compressor starts are
displayed with a single key press. The maximum value
for both hours and starts is 99,999, at which point they
will roll over to 0. A single display is available under this
key and is displayed below.
HOURS 1=XXXXX, 2=XXXXX
START 1=XXXXX, 2=XXXXX