NPU, SW Version 1.8, ©ComAp, September 2003
NPU-1.8r2.PDF 14
5. Settings
Buttons
Parameters and quantities are divided into two sets. For transfer from one set to the other press MODE
button for 5 seconds. See tables for these sets. Items (parameters and quantities) in tables are in the same
sequence as on display.
If the SET button is available (the SET button can be protected with panel fixed by two seals), parameters
can be adjusted by pressing of SET button.
For transfer between items use ↑ (up arrow) or ↓ (down arrow).
Display and LEDs
Parameters or measured quantities are displayed on four digits display.
The display switches on after pressing any button and switches off after the time given by B2. If B2 is 0,
than the display never switches off. The display switch off also aborts unfinished parameter settings.
The green LED PWR indicates power supply.
Three-color LEDs L1, L2, L3 indicate the phase that corresponds to the data on display (yellow color) or to
a failure LED (red color).
Three-color LEDs f
↑, f↓, U↑, U↓, ∆U, U, indicate failure type (red color) or data on display (yellow color).
The three-color LED ERR follows relay RE2 (red color id. RE2 is open, switches off if RE2 is closed) and
also NPU internal error (red flashing).
Notes:
If any LED shines or flashes red the failure is indicated. The failure indication has always priority to another
indications.
The LEDs L1, L2, L3, f
↑, f↓, U↑, U↓, ∆U, U, shine red immediately after failure (without delay). If RE2
relay opens LED’s starts red flashing. The LED flashing is finished by pressing any button or the time given
by B2. Failures are not indicated by red LED flashing if B2 is zero.
Parameters settings
Press the SET button and the first digit starts flashing. The flashing digit can be changed by pressing ↑(+1)
and ↓(-1) buttons. The next digit is selected by pressing MODE button.
If the required parameter value is displayed press the SET button again and the new value is stored. If a
new value is out of allowed range the NPU sets it to proximate value.
Caution: a new value is applied immediately.
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