OPERATION – TROUBLE SHOOTING
6
February 2015 / DC Master 24/12 50A / EN
4 OPERATION
4.1
SWITCHING ON AND OFF
The DC Master does not have a main switch; it is enabled
by inserting the fuse, refer to chapter 3.
Despite its low no-load consumption, the converter should
be disconnected from the supplying battery when it is not
in use to protect the battery from discharging.
4.2
REMOTE SWITCH FUNCTION
The DC Master can be operated remotely by means of an
optional remote switch. See figure 2, reference 9. If the
ENABLE input is powered by the input voltage, the DC
Master is switched on.
4.3 STATUS
LED
See Figure 2. The Status-LED (ref. 7) shows the operation
mode of the DC Master.
LED indication
Meaning
Continuous green
DC Master is working OK
Other
Fault condition, refer to chapter 5.
4.4 MAINTENANCE
No specific maintenance is required. If necessary, use a
soft clean cloth to clean the DC Master. Do not use any
liquids or corrosive substances, such as solvents, alcohol,
petrol or abrasive components.
Check the wiring on a regular base. Defects such as loose
connections, burnt wiring etcetera must be corrected
immediately.
5 TROUBLE
SHOOTING
If you cannot solve a problem with the aid of this chapter,
contact your local Mastervolt Service Centre. See
www.mastervolt.com/dealer-locator. Make sure you have
the article and serial number (See section 1.4) present if
you have to contact your local Mastervolt Service Center
to solve a problem:
Problem
Possible cause
What to do?
Output voltage is OK,
Status LED yellow
High load
Reduce connected load
Output voltage is OK,
Status LED yellow
blinking @ 1Hz
Too high load
Reduce connected load, output power is limited
by the DC Master
Output voltage is OK,
Status LED yellow
blinking @ 2Hz
Too high temperature
Reduce load and let the converter cool down.
Output power is limited by the DC Master
Converter switches on
and off.
Too high load
Reduce connected load
Too high temperature
Reduce load and let the converter cool down.
Voltage drop over DC cables
Check cable length and wire gauge
Loose connections
Check connections and replace if necessary
No output voltage, Status
LED is OFF
Input fuse blown
Check the cause of the blown input fuse(s). Then
replace the fuse(s).
Enable contact is open
Connect Enable contact to the positive input (see
section 3.4 and 4.2)
No input voltage or input voltage too low.
Check wiring, fuses and battery.
No output voltage, Status
LED flashing green
Input voltage too low
Check battery voltage, cable length, wire gauge
Input voltage too high
Check battery voltage
No output voltage, Status
LED is continuous red.
Converter is shut down due to a fault
condition (too high load, short circuit, too
high temperature)
Reduce load and let the converter cool down.
Converter will automatically restart after 1 minute
No output voltage, Status
LED is blinking red.
Converter was shut down several times
due to a fault condition
Reduce load and let the converter cool down.
Converter must be restarted manually by
switching off and on the DC input voltage
