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Mastervolt Solar ChargeMaster SCM20 PWM Manual

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14 EN / SCM20 & SCM40 PWM User’s Manual
4 TROUBLE SHOOTING
If you cannot solve a problem with the aid of this chapter, contact your local Mastervolt Service Centre. See
www.mastervolt.com/technical-support. Make sure you have the following information present if you have to contact your local
Mastervolt Service Center to solve a problem: Article and serial number; see section 1.4
Malfunction Possible cause What to do?
No display function Battery voltage is abnormal Check battery voltage. Battery voltage must be
10~15V for 12V systems or 20~30V for 24V
systems.
Reversed polarity of the Battery Check wiring to battery
No voltage at Load
output
Fault condition See below error codes E1 ~E5
Wrong setting of the Load mode Check settings of the Load mode (section 2.6)
Short circuit at Load output Switch off all loads, remove short circuit. Load
output will automatically resume after 1 minute.
Overload at Load output Reduce the connected load. Load output will
automatically resume after 1 minute.
Battery voltage is too low; see section 2.6
for configuration of the Low voltage
disconnect function.
Reduce load connected to the batteries and
charge batteries. Load output will automatically
resume after 1 minute.
Overcharge, battery voltage is too high
(>15.5/31.0V)
Check batteries. Check other charging systems.
Use the battery temperature sensor.
Over temperature Check cooling of the Solar Chargemaster
No battery charging
during daytime
Batteries are full Nothing.
No power from the PV-modules.. Check wiring to PV-modules. Check for loose
connections, short circuit or incorrect polarity
Damaged battery temperature sensor Check battery temperature sensor (if applied)
Output voltage too low,
charger supplies
maximum current
Load that is connected to the batteries is
larger than charger can supply.
Reduce load taken from the batteries.
Batteries not 100% charged Measure battery voltage. After some time this will
be higher.
Wrong battery type setting Check settings (see section 2.6).
Battery is discharged too
fast
Battery capacity reduced due to sulphation
or due to plate corrosion
Charge and recharge a few times, this might help.
Check battery and replace if necessary.
Too low charger capacity or battery
capacity or too high load
Check balance between charger capacity, battery
capacity and load
Batteries are too warm,
gassing
Defective battery (short circuit in cell) Check battery and replace if necessary.
Battery temperature too high Use the battery temperature sensor.
Charge current too high for battery Check specifications of battery for maximum
allowed charge current
Wrong battery type setting Check settings (see section 2.6).
… 14


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