Fusion Installation & Commissioning Manual Approved document No UI-FBU-01 issue 3.0
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POWER SUPPLY MODULE
The Fusion power supply is a sophisticated fully compliant EN54-4 unit. The following indications
are provided on the power supply in addition to information given by the main control panel display
Testing and maintenance
Disconnect the mains supply. The ‘General Fault LED ’ and the ‘ Power Fault LED’ will show and
the internal buzzer will sound . The LCD will indicate ‘ MAINS FAIL ’.
Mute the buzzer by pressing the No. 7 key on the keypad, ‘mute buzzer’. Reconnect the mains, all
Fault LEDs will extinguish.
Disconnect the battery. After a period of time in the region of 60 to 80 seconds ,The ‘General Fault
LED ’ and the ‘ Power Fault LED’ will show and the internal buzzer will sound . The LCD will
indicate ‘ Low battery fault ’.
Mute the buzzer by pressing the No. 7 Key on the keypad, ‘mute buzzer’. Reconnect the battery,
all Fault LEDs will extinguish after a 60—80 second delay.
Calibration Mode
The Fusion Power supply has a calibration mode to enable simple checking of the battery charging
voltage setting. The Voltage setting is normally calibrated in the factory and should not require
adjustment. However local conditions may require small adjustments.
The power supply has a temperature compensation circuit so the ambient temperature will need to
be taken into account. see the attached chart detailing possible battery charging voltage Vs
temperature.
The calibration mode is entered using the calibration mode dil switch. This switch will set the PSU
into CAL mode for 60 seconds only. The normal state for the CAL mode switch is in the ‘ON’
position switching ‘OFF’ will invoke the CAL mode .During Cal mode the charger voltage should be
monitored with a voltmeter calibrated to a known NAMAS standard source. There is a small square
pad on the pcb next to the CAL switch la this point is for the +Ve lead of the voltmeter and
the –ve lead of the voltmeter should be connected to 0V which can be the nearby –36v terminal.
During CAL mode all the PSU LEDs will flash together intermittently and the battery is disconnected
internally from the charger. (Note a mains fail during CAL mode will cause the panel power
down).The Voltage setting can be checked now. There are also two additional switches which will
cause the PSU to simulate the charging voltages for a range of temperatures . Voltages will be
checked in the area of 26—30V DC (For meter setting information.) Procedure continues on next
page.
Supply On (green)
Indicates the presence of power at all times (battery and or mains supply)
Mains Fault (amber)
Mains supply has been disconnected or power from 36v power pack is not
present.
Battery Fault (amber)
The battery is not connected or the battery voltage is below 19.8vdc or the
battery has a high resistance (greater than 0.8R)
Battery Disconnection
To prevent deep discharge to sealed lead acid cells. If the load current is
greater than 500mA the battery will be cut off at 19.2vdc. If the load current is
less than 500mA the battery will be cut off at 22vdc
Voltage Fault (amber)
Indicated if the charger voltage is less than 23vdc or greater than 29.2vdc
Earth Fault (amber)
Indicated if there is a connection between the 28 volt supply rails and Earth
lower than 100K Ohms impedance
OP1 Limit (amber)
There is a short circuit or excessive load on 28v OP 1
OP2 Limit (amber)
There is a short circuit or excessive load on 28v OP 2
