York OPTIVIEW Operation Manual page 66

SECTION 2 - OPTIVIEW CONTROL CENTER INTRODUCTION
VSD Output Frequency
Displays the present output frequency to the motor.
Phase Rotation
Displays the phase rotation sequencing
Output Current Rating
Indicates VSD size reported from VSD.
Motor Run (LED)
Indicates the digital output from the controls is com-
manding the motor to RUN.
DC Bus Regulating (LED)
Indicates the VSD is regulating the DC bus.
Precharge Complete (LED)
Indicates the VSD DC bus has been pre-charged.
Input Current Limit (LED)
Indicates the chiller input current is at the Job FLA limit.
Cooling System (LED)
Indicates the relay controlling the VSD water pump
output is energized.
Precharge Active (LED)
Indicates the VSD is pre-charging the DC bus.
DC Bus Voltage
Displays the DC Bus voltage.
Total Supply kVA
Displays the total kilovolt-Amps measured by the VSD.
Input Voltage Peak (L1, L2, L3)
Displays the three-phase input peak voltages measured
by the VSD (Neutral to Line).
Input Voltage RMS (L1, L2, L3)
Displays the three-phase input RMS voltages across
each line.
Input Current RMS (L1, L2, L3)
Displays the three-phase input current values measured
by the VSD.
Output Voltage RMS (Phase A, B, C)
Displays the three-phase output RMS voltages across
each line.
Output Current RMS (Phase A, B, C)
Displays the three-phase output current values mea-
sured by the VSD.
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Rectifier Baseplate Temperature (L1, L2, L3)
Displays the VSD input rectifier baseplate tempera-
tures at each phase.
Inverter Baseplate Temperature (Phase A, B, C)
Displays the VSD output inverter baseplate tempera-
tures at each phase.
Internal Ambient Temperature
Displays the ambient temperature inside the VSD cabi-
net from two sensors as reported by the VSD.
PROGRAMMABLE
Manual DC Bus
Access Level Required: SERVICE
Provides a means to set manual Precharge or Preregu-
late of the VSD DC Bus while the chiller is stopped
with no VSD faults present. The selection Disabled re-
turns to automatic.
Manual Cooling
Access Level Required: SERVICE
Enabled provides a means to operate the VSD coolant
pump and fans while the chiller is stopped. The selec-
tion Disabled returns to automatic.
Test Mode
Enables the Service Technician to check for proper gat-
ing of the IGBTs in the inverter. The inverter's PWM
modulator shall repetitively gate the inverters's IGBTs
in the following manner while the test mode is enabled:
three upper IGBTs on for one second, all IGBTs off for
one second, three lower IGBTs on for one second, all
IGBTs off for one second. Service technicians refer-
ence VSD Service Manual (Form 160.78-M3) for op-
eration of this feature.
The following conditions must all be met for test mode
to initiate:
• The VSD must be OFF (not in pre-charge or run);
• DC link voltage must be less than 50 V.
• No VSD faults exist
• The Test mode lockout timer is not timing. The
Test mode lockout timer shall time four minutes,
after being initiated by either of the following two
conditions:
1. The system has transitioned from Run to
Stop mode; or
2. The VSD logic board has just powered up.
FORM 160.78-O2
ISSUE DATE: 5/22/2017
JOHNSON CONTROLS