EC 325 Power Supply Details
For complete operation details refer to our Instruction
& Specifications Manual available from Wirraway
Motorhomes as a PDF document that will be emailed
to you on request. Some of this information is
included in the following text and illustrations, refer to
instruction manual for full operating instructions.
3.1 Battery Charger
The EC325PSU incorporates an intelligent ‘offline’
battery charger that disconnects the leisure equipment
from the battery while it is being charged. This process
allows the charger to use higher charging voltages and
to accurately control the charging current.
No other equipment may be connected directly to the
battery while charging is taking place. This intelligent
battery charger draws power from the power converter
when the mains 230v supply is turned on and from
the vehicle alternator when the engine is running,
therefore the leisure battery is always charged via the
intelligent battery charger. The charger can be preset
at instillation for either Gel or Lead Acid batteries.
The EC325 system also incorporates a battery
compartment temperature sensor, which monitors the
battery ambient temperature to allow the charger to
adjust the charging current if the battery is very cold or
hot to optimise performance.
3.2 Residual Current Device
& Miniature Circuit Breakers
The Residual Current Device (RCD) is basically
provided to protect the user from lethal electric shock.
The RCD will turn off (trip) if the current flowing in the
live conductor does not fully return down the neutral
conductor, i.e. some current is passing through a
person down to earth or through a faulty appliance.
To ensure the RCD is working correctly, the test button
should be operated each time the vehicle is connected
to the mains supply.
The Miniature Circuit Breakers (MCB’s) operate in a
similar way to traditional fuses and are provided to
protect the wiring installation from overload or short
circuit. If an overload occurs the MCB will switch off
the supply. If this occurs you should investigate the
cause of the fault before switching the MCB back on.
3.3 System Monitor
The system monitor circuit
checks the power supply
key components to ensure
optimum operation. The
current status is displayed
on the front of the PSU
by the means of a clear
indication that illuminates in
different colours depending
on the PSU status.
EC325 Power Control System
Issue 01B
Page 3 of 16
28 January 2007
1 Template
Instructions
<<Delete before
use>>
3.2 Residual Current Device & Miniature Circuit Breakers
The Residual Current Device (RCD) is basically provided
to protect the user from lethal electric shock. The RCD will
turn off (trip) if the current flowing in the live conductor
does not fully return down the neutral conductor, i.e. some
current is passing through a person down to earth or
through a faulty appliance.
To ensure the RCD is working correctly, the test button
should be operated each time the vehicle is connected to
the mains supply (see section 5.1)
The Miniature Circuit Breakers (MCB’s) operate in a similar
way to traditional fuses and are provided to protect the
wiring installation from overload or short circuit. If an
overload occurs the MCB will switch off the supply. If this
occurs you should investigate the cause of the fault before
switching the MCB back on.
The following table shows the rating and circuit allocation for the three MCB’s
MCB
Rating
Wire Colour
Description
1
10 Amps
White
230v Sockets
2
10 Amps
White (Yellow for heater)
Extra 230v Sockets / Heater
3
6 Amps
Black (Blue for water heater)
Fridge / Water Heater / 12v Charger
(internally connected)
3.3 System Monitor
The system monitor circuit checks the power supply key components to ensure
optimum operation. The current status is displayed on the front of the PSU by
the means of a clear indication that illuminates in different colours depending
on the PSU status.
Le
ft
C
en
tre
R
ig
ht
Status
Indication description
-
- G
Good
Mains supply on, PSU status good.
-
-
-
Good
Mains supply off, PSU status good.
- O G
Warning
Mains supply on, PSU in warning mode. In this mode the PSU will
limit the output current to protect the unit from damage. It is still safe
to use the unit but the fault should be investigated. Typical causes are
battery temperature sensor unplugged, cooling fan not working,
internal sensors disconnected or failed.
- O -
Warning
Mains supply off, PSU in warning mode.
R O G
Failure
Mains supply on, PSU in overheat failure mode. In this mode the PSU
will shutdown and all equipment will be switched off. The cooling fan
will continue to run until the unit cools down. Typical causes are short-
circuited DC output, battery connected in reverse, cooling fan failed,
cooling vents blocked / covered, problem caused by prolonged use in
warning mode.
R
- G
Failure
Mains supply on, PSU in overheat failure mode.
R O -
Failure
Mains supply off, PSU in overheat failure mode.
Test
Button
RCD
MCB’s
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