Introduction
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Operator Interface Controls
Operator interface controls are located on the front door of the main inverter
enclosure. These controls include an ON/OFF Switch, 4-l ine LCD display and
keypad called the Universal Frontpanel Control Unit (UFCU). Additionally there
is an AC and DC Disconnect on the AC Interface Enc losure and the DC Interface
Enclosure Doors.

Main Enclosure Door Interlock Switch

The front door of the PV225S main enclosure is equipped with an interlock switch
to preclude operation while the front door is open. Opening t he door of the main
inverter enclosure will initiate an imme diate controlled shutdown of the PV225S
and opens both the main AC and DC contactors. The main AC and DC contactors
cannot be closed unless the door’s interlock is in the engage d position. The
PV225S is prevented from being restarted until the door is ag ain closed and the
switch is in the engaged position.
It is required that the PV225S main enclosure door must be locked during normal
operation. The door interlock switch does NOT remove all hazardous voltages
from inside the inverter. Before attempting to service the PV225S, follow the
de-energize Lockout and Tag procedure on page 5–3.
Figure 1-6
PV225S Operator Interface Components
AC Disconnect
Switch
AC Interface Enclosure
(AC Side View)
DC
Disconnect
Switch
DC Interface
Enclosure
LCD
Display
Universal
Frontpanel
Control
(UFCP)
ON/OFF
Switch
Communication
Enclosure
Main Inverter Enclosure
(Front View)