hager HZI810 - Page 32

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OPERATION TROUBLESHOOTING GUIDE
Automatic sequences
RETURN TO PRIORITY SOURCE
This sequence is activated as soon as the changeover-
switch is in automatic mode and in emergency position
(position II) :
• the priority source is not available
• the changeover switch is in emergency position
(ex: genset)
• the emergency source is available.
>  Specific feature: manual re-transfer
• When priority source comes back, it can be required
not to automatically retransfer and wait for a more
adequate moment.
• It is possible, validating manual retransfer feature
(referto programming), to block the re-transfer.
It is initiated from:
• Validation push button localy or on remote interface
• Via a programming input if MTF option is selected.
> Sequence description
Manual retransfer = validation press
OR
optional input activation, Mtf feature
Problem Action to be performed Expected results
1
Product is
OFF (display
and LEDs are
off).
Check that the connections are as indicated in the technical documentation
provided with the product.
Specic case: Single-phase application:
- Connect the incoming supply cables to terminals 104 (Neutral) and 106 (Phase).
- Bridge terminals 103 and 104.
- Congure the network type to 1BL in the SETUP menu.
Controller is on:
“ON” LED is lit. If
the product is still
OFF it should be
returned to
Directly check that voltage is present across the terminals with a voltmeter:
- Voltage presence on Priority source ➡ terminals 104 – 106 (U>100Vac)
- Voltage presence on Emergency source ➡ terminals 203 – 205 (U>100Vac)
2
Product is
faulty (fault is
active) FT1,
FT2, FT3,
FT4
• Disconnect power supply to try to reset the fault
• In case of programming inputs FT1 or FT2, verify if external fault is not
active (atomatic reset).
• In case of programming inputs FT3 or FT4, verify if external fault is not
active. The fault must be reset or keypad (validation push button)
Default out
3
“SOURCE 1
availability”
LED is off.
Press the “Lamp test” button. The display and all
LEDs are on.
Message “PROT1” is shown ➡ reverse terminals 104 and 105.
“SOURCE 1
availability” LED
is on.
Check the following parameters in the SETUP menu (programming mode):
- network type ➡ NETWORK : 4NBL, 2NBL, 2BL, 1BL, 3NBL….
- nominal voltage ➡ Un : voltage across the terminals should be veried with
a multimeter.
- frequency ➡ Fn : 50 or 60 Hz
Check the threshold and hysteresis of the nominal voltage and frequency in
the VOLT and FREQUENCY menus and adjust if necessary.
4
“SOURCE 2
availability”
LED is off.
Press the “Lamp Test” button The display and all
LEDs are on.
Note: An unloaded generator can produce a voltage and frequency > than
its nominal values:
- Check threshold and hysteresis settings for the nominal voltage (VOLT menu).
- Check threshold and hysteresis settings for the nominal frequency
(FREQUENCY menu).
“SOURCE 2
availability” LED
is on.
Check parameter Un in the SETUP menu (programming mode). This setting should
correspond to the value measured across terminals 203 & 205 with a multimeter.
5
Retransfer is
not achieved
after the
priority
source
has been
restored.
Check the status of the “SOURCE 1 availability” LED. If this LED is not on,
refer to the appropriate section above (“SOURCE 1 availability” LED is off).
Item 3
“SOURCE 1
availability” LED
is on.
Check that the product is in automatic mode:
- Auto mode on controller must not be inhibited. Check that a programmable
input, if congured, has not been activated (verify that the MANU indicator
is not displayed).
- When utilising with change over switch verify the handle has been removed
and that the selector is in the automatic position.
Automatic mode is
selected.
Check status of source 1 stability timer (Mrt). Priority source is not
considered available until this timer has nished counting down.
Retransfer is achieved
after Mrt delay.
Check to see whether “MtF” (manual retransfer) has been activated in the
SETUP menu (YES = enabled).
“MtF” = NO (manual
retransfer disabled).
If “MtF” = YES,
Conrm retransfer.
Automatic transfer is
achieved.
Priority source unavailable
Generator running (emergency source) &
Switch in position II