Fridge DW Series Product Manual

the compressor by snapping the cover over the screw head (1).
Power supply (g. 5.4.1)
The electronic unit must always be connected directly to the battery poles (2). Connect the
plus to + and the minus to -, otherwise the electronic unit will not work. The electronic unit is
protected against reverse battery connection. For protection of the installation, a fuse (3) must
be tted to the + cable as close to the battery as possible. It is recommended to use 15 A fuses
for 12 V and 7.5 A fuses for 24 V circuits. If a main switch (4) is used, it should be rated to a current
of min. 20 A. The wire dimensions in Fig. 5 must be observed. Avoid extra junctions in the power
supply system to prevent voltage drops from aecting the battery protection setting.
Battery protection (g. 5.4.1)
The compressor is stopped and re-started again according to pre-established voltage limits
measured on the + and - terminals of the electronic unit. The standard settings for 12 V and 24 V
power supply systems appear in g. 5.4.3. Other settings (g. 5.4.4) are optional if a connection
which includes a resistor (9) is established between terminals C and P. In solar applications
without a battery a 220 kW resistor is recommended. In AEO (Adaptive Energy Optimizing)
speed mode the BD compressor will always adapt its speed to the actual cooling demand within
a random operation voltage of 9.6 to 31.5 V.
Thermostat (5.4.1) I
The thermostat (7) must be connected as described in chapter 10.
LED (optional, g. 5.4.1)
It is also possible to connect a 10 mA LED diode (6) between the + terminals and D. If the
electronic control unit should detect an operating error, the diode will ash for a certain number
of times. The number of ashes depends on what kind of operational error was recorded. Each
ash will last ¼ second. After the actual number of ashes there will be a delay with no ashes,
so that the sequence for each error recording is repeated every 4 seconds.
No. FLASHES ERROR TYPE
5
Electronic unit thermal stop. If the cooling system has been overloaded or the ambient
temperature is too high, the control unit will overheat.
4
Insucient motor speed. If the cooling system is overloaded, the motor is no longer able
to maintain a minimum speed of 1,850 rpm
3
Motor start error. The motor is blocked or the dierential pressure of the cooling system
is too high (> 5bar).
2
Fan stop due to overcurrent. The fan has a power input from the electronic control unit
of more than 1App
1 Battery protection stop. The power voltage is outside the set disconnect value.
61
EN