JOHNSON CONTROLS
46
FORM 160.81-O1 (1020)
ISSUE DATE 10/05/2020
SECTION 2 - OPTIVIEW™ CONTROL CENTER
Optiview Control Center
GROUND FAULT PROTECTION SCREEN
Overview
With software version C.MLM.05.06.xxx (and later)
or C.OPT.05.06.xxx (and later), this screen is used to
clear a “Motor – Ground Fault” safety shutdown. With
these and later software versions, an ADMIN password
is required to clear this fault and restart the chiller. This
is to prevent the severe compressor/motor damage that
could occur from initiating chiller starts after this fault
has occurred. To prevent restarting the chiller until the
motor condition can be evaluated by a qualified ser-
vice technician, the chiller cannot be started until the
Ground Fault contacts (TB3-71) open and the service
technician obtains an ADMIN password from YORK
and performs a special reset procedure listed in OptiV-
iew Control Center Service Instructions (Form 160.81-
M1).
The ADMIN password must be obtained
from YORK. Service Technicians refer to
OptiView Control Center Service Instruc-
tions (Form 160.81-M1).
Display Only
Motor Run (LED)
Illuminates when the compressor motor is being com-
manded to run.
FIGURE 15 - GROUND FAULT PROTECTION SCREEN
LD11549
Motor Ground Fault Switch (LED)
Illuminates when a motor Ground Fault safety shut-
down is in effect.
Motor Current % Full Load Amps
Displays the motor current as a percentage of full load
amps (FLA).
Voltage Phase A, B and C
Displays the 3-phase input line voltage measured by
the Solid State Starter.
Current – Phase A, B and C
Displays the 3-phase motor current values measured
by the Solid State Starter.
Programmable
Fault Acknowledge
Access Level Required: ADMIN
This key is only displayed if a “Motor – Ground Fault”
condition is in effect. It is used to perform the special
reset procedure required to clear the “Motor – Ground
Fault” fault and restart the chiller.
Software version C.MLM.05.06.xxx (and later) and C.OPT.05.06.xxx (and later)
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