User`s guide

4. Operation

164201085 Rev. F0

LCD panel Menu

The following information can be viewed by pushing the LCD control buttons (

and ).

Push the button to scroll from beginning to end of the list. Push the button to scroll from

the end to beginning of the list.

1. Input Voltage (measured phase to neutral)

2. Battery Voltage

3. Charge Current

4. Ambient Temperature (temperature of air intake from the front of the inverter module;

displayed in degrees Celsius and degrees Fahrenheit,

5 degrees)

5. Standby Events: displays the number of times that the ZTT/Plus operated on inverter

(the number of times the ZTT/Plus transferred to battery)

6. Standby Minutes: displays the cumulative time in minutes that the ZTT/Plus operated on

inverter (the total number of minutes on battery)

7. Output Voltage (measured phase to neutral)

8. Output Current

9. System Display

Resetting Standby Counters

To reset the standby counters (items 5 and 6 above), press and hold both LCD control buttons

( and ) simultaneously for 10 seconds.

LCD Operation

The ZTT/Plus LCD has an automatic 25-second delay for reporting system parameters (such

as voltage, current, events). This delay allows time during maintenance visits for writing the

readings on the maintenance log sheet. The LCD reporting screen displays the data for 25

seconds or until you press the control buttons ( and ) to advance the screens.

If the ZTT/Plus mode of operation changes (for example, goes to standby operation) while the

ZTT/Plus LCD is reporting system parameters, the LCD panel displays the current parameter

for 25 seconds and then reports the new mode of operation.

Before demonstrating or testing the manual standby operation (turning the AC circuit breaker

off and on), confirm the LCD is in a status screen such as Normal mode or Standby mode.

4.3 Front panel,

continued