Mastervolt ALPHA PRO User Manual

24
Alpha Pro charge regulator – User and Installation Manual
8 TROUBLESHOOTING
In case of any issue, we recommend consulting the Maintenance section first (see section 7). If you cannot solve a
problem with the aid of the table below, contact your local Mastervolt dealer. See www.mastervolt.com.
ISSUE
POSSIBLE CAUSE
SOLUTION
The three LEDs of the Alpha
Pro are blinking together.
• This is the start-up mode of the
Alpha Pro. After this the Alpha Pro
starts regulating.
This is a normal situation. Wait until the
LEDs stop blinking.
The three LEDs of the Alpha
Pro are blinking twice, one
after the other.
• The Alpha Pro MasterBus
configuration was unlocked, it has
stopped regulating. Or unit has not
been setup.
Adjust the settings if needed and lock the
configuration. The Alpha Pro enters the
start-up mode after this.
No voltages at all. All LEDs
of the Alpha Pro are off.
• Battery fuse has blown.
Investigate the cause of this malfunction.
Then replace the fuse.
• Battery connections are corroded
or bad.
Clean and tighten the connections. If the
cables are damaged, replace them.
• Black [gnd] wire is loose.
• Reg on wire does not get voltage
Check black [gnd] wire.
See next issue and solutions
No output power, all LEDs
of the Alpha Pro are off.
Voltage on the [+bat]
terminal is 12/24V.
Voltage on the [reg-on]
terminal of the regulator is
0V.
• Engine is not running.
Start the engine.
• 2 Amps fuse in brown wire is
blown.
Check the 2 Amps fuse and replace if
necessary.
• Problem with the oil pressure
switch or ignition relay (S1) or
brown [reg on] wire is loose.
Check brown [reg on] wire. Check the oil
pressure contact or ignition relay for
correct operation.
No output power, one of the
LEDs of the Alpha Pro is on.
Voltage on the [field]
terminal of the regulator is
0V.
• Fuse in the red wire blown.
Check the fuse and replace if necessary.
Alpha Pro II = 10A
Alpha Pro III = 20A
• Two pole field connector of the
wiring loom is loose (red and blue
wire).
Check field connector on the alternator.
• Problem in the wiring.
Check red and blue wires to the field
connector.
• Blue [field] wire is loose.
Check blue wire.
• Field windings of the alternator are
defective.
Check resistance of field windings.
Replace alternator.
No output power.
Voltage on the [reg on] and
the [+bat] terminal of the
regulator are both 12/24V.
• The Stop charge event has been
triggered.
No action required. This is normal
behavior.
No output power, All LEDs
of the Alpha Pro are off.
Voltage on the [reg on] and
the [+bat] terminal of the
regulator are both 12/24V.
• Black [gnd] wire is loose.
Check black [gnd] wire.
• Alpha Pro defective.
Replace Alpha Pro.

Mastervolt ALPHA PRO Specifications

General

Brand	Mastervolt
Model	ALPHA PRO
Category	Controller
Language	English