INSTALLATION AND TROUBLESHOOTING INFORMATION FOR MODEL A31
PAGE 8 OF 15
If the green LED "READY" does not light, check the type and number of cells of the battery to verify that
it is correct.
If the LED marked “REVERSE POLARITY” illuminates, the battery has not been installed as indicated.
Disconnect the battery wires immediately or damage to the inverter may occur.
8.7
AC LOAD AND AC BYPASS LINE
A terminal strip, (TS-A), is provided for the AC load and AC bypass line, when used. Connect the AC load
wires phase (hot) to the phase terminal. Connect the neutral to (N) terminal.
8.8
ADJUSTMENTS
The unit is factory set. No field adjustments are necessary. If an internal setting must be changed, call
the factory for more information.
8.9
START - UP
The start-up procedure will guide you on how to safely power up an A31 Inverter with or
without a static switch and to confirm the utility power wiring to the inverter.
(INVERTER PRIME)
If the inverter has a 1 millisecond static switch,
Option codes 22P or 22S
, it will have a S2A-239A
circuit board.
After the pre-charge instructions are complete, turn on the AC output breaker of the inverter.
The LED’s on the front door should do a blink sequence and the “LOAD ON” prime LED and the
“INVERTER AVAILABLE” LED should light. Turn on the bypass source. (Utility).
The “PHASE-LOCK” LED, “UTILITY AVAILABLE” LED, “INVERTER AVAILABLE” LED AND “LOAD ON
PREFERRED SOURCE” LED should be lit. The re-transfer switch should be in the auto position. Confirm
the output voltage at the load terminals.
(INVERTER STANDBY)
If the inverter has a 1 millisecond static switch,
Option codes 22P or 22S
, it will have a S2A-239A
circuit board.
After the pre-charge instructions are complete, turn on the AC output breaker of the inverter.
The LED's on the front door should do a blink sequence and the "LOAD ON ALTERNATE" LED and the
“INVERTER AVAILABLE” LED should light.
Turn on the bypass source (Utility). The "UTILITY" LED, the "LOAD ON PREFERRED SOURCE" and the
"PHASE LOCK" LED should light. The re-transfer switch should be in the auto position.
To confirm settings the customer cal mode may be entered by holding the select switch (SW1 on the
239A board, SW1 on the 240 board) in the up position for 5 continuous seconds. Upon entry the display
will show “CAL”. The calibration mode works such that the software will execute each calibration task in
a predefined sequence advancing to the next calibration setting only when the operator toggles the
transfer mode switch.
Refer to the 22P/22S Static Switch (P25-DSSS-1) specification sheet
included in manual.
If the inverter has a 20 millisecond static switch
, Option codes 164 or 165,
it will have printed circuit
board S2A-139A. Turn on the alternate source (bypass). The "BYPASS AVAILABLE" LED and "LOAD ON
BYPASS" LED should be lit. The "INVERTER AVAILABLE" LED should be “OFF”. Turn on the AC output
breaker of the inverter. Confirm the output voltage at the load terminals.
If the inverter does not have any static switch, after confirming that there is no voltage on the load
terminals, then turn on the AC output breaker of the inverter. Confirm the output voltage of the inverter
at the load terminals.
Once the inverter start-up has been completed it does not matter if you turn the inverter or utility
(bypass) on first because the wiring has been tested.
