Quantech QWC4, Installation Operation & Maintenance, Page: 107 / 156

QUANTECH
107
SECTION 6 - OPERATION
FORM QWC4-NM1 (221)
ISSUE DATE: 02/28/2021
6
VSD DATA AND OPERATING HOURS/START COUNTER KEYS
LD19539
FIGURE 51 - VSD DATA AND OPERATING HOURS/START COUNTER KEYS
VSD DATA
KEY
OPERATING
HOURS/START
COUNTER KEY
The VSD DATA key provides multiple displays of
VSD operating data, such as voltages and currents.
Press the VSD DATA, or ▲ or ▼ key to view multiple
messages, which are explained below.
VSD FREQUENCY ACTUAL = ###.# HZ
COMMAND = ###.# HZ
VSD COMP = ### AMPS = ### % FLA
This key displays the calculated COMPRESSOR mo-
tor currents.
VSD CURRENT LIMIT LOCAL = ### %FLA
BAS = ###
REMOTE = ### %FLA
CURRENT LIMIT displays the current limit values as
set under the PROGRAM key, remotely by a BAS, and
REMOTE CURRENT LIMIT input. Inactive current
limits will display XX instead of a numeric value.
VSD DC BUS VOLTAGE = ### VDC
VSD INTERNAL AMBIENT TEMP = ###.# °F
COOLING SYSTEM STATUS = ON OR OFF
VSD IGBT BASEPLATE TEMPS T1 = ### °F
T2 = ### °F
VSD PRECHARGE SIGNAL = ON OR OFF
VSD COMP MOTOR OVERLOAD = ### AMPS
This message (above) displays the setting of the VSD's
105% FLA potentiometer for the Compressors. The
settings are determined by the adjustment of the over-
load potentiometers on the VSD logic board, which are
factory set, and should not require changing unless the
circuit board is replaced.
Operating Hours/Start Counter Key
HOURS 1=###, 2=###
START 1=###, 2=###
Compressor operating HOURS and STARTS are dis-
played with a single key press. The maximum value is
99,999, at which point both values roll over to zero.