Modulon NH Plus Series
5-2
If the conditions mentioned above are satisfied, follow the steps below to start up.
1. If there is an external battery cabinet, switch the circuit breaker of battery cabinet to
ON and confirm if manual bypass protection circuit breaker Q3 is cut off and switched
to OFF.
2. Switch on Q2 and Q4.
The LCD monitor will start displaying. After initialization, the LCD screen will
show ”ON AUTO BYPASS”. In the meantime, the UPS output is supplied by the
bypass source and the LED indicator of ”BYPASS” will also light on.
3. Switch Q1 to ON. If the input power source is within tolerance range, the UPS power
module will be ready to start up.
4. Press the “I” button for 3 seconds until you hear a “beep” and then release the button.
At this time, the inverter will start the synchronization with bypass source. The UPS
will automatically transfer from bypass mode to inverter mode, and the output will be
supplied by the inverter. The ”BYPASS” LED indicator lights off and the ”NORMAL”
LED indicator lights on.
5-2 Battery Startup Procedures (Single Unit)
1. Switch the circuit breaker of external battery cabinet to ON and confirm if Q3 is cut off
and switched to OFF.
2. Press the “I” button for 3 seconds until you hear a “beep” and then release the button.
3. The UPS will start up by DC-bus soft start. The inverter will be activated by adopting
the default frequency value.
4. When the inverter startup is completed, the UPS will transfer to Inverter mode and
the ”BATTERY” LED indicator lights on.
5-3 Shutdown Procedures (Single Unit)
This operating procedure can cut off all the power supply. Be sure to confirm if the loads
are turned off first! Refer to following steps.
1. Press the “O” button for 3 seconds until you hear a “beep” and then release button.
The LCD screen will show “SHUTDOWN UPS?”, then selected “YES” and press
“
” to confirm.
If the UPS is originally in
- Normal mode: The UPS will transfer to bypass mode. The LCD screen will
show ”ON AUTO BYPASS”.
- Battery mode: The UPS will shut down the inverter and cut off the output power.
2. Switch off Q1.
3. Switch off Q2.
4. Confirm if the UPS is turned off and all the circuits are off.
5. If there is an external battery cabinet, switch off the circuit breaker of battery cabinet.
6. Switch off Q4.
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