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EN / SunMaster CS15TL RP / CS20TL RP / CS30TL RP
12 TROUBLE SHOOTING
12.1 LED INDICATION AND SOLUTION TABLE
Fast blink= 2 blinks per second, slow blink = 1 blink per second
LED indication Display indication Description What to do
No LED function
Red, fast blink
Red
Red
Red
Grid faults
Hardware faults
Ambient faults
Normal operation
StringMaster faults
Red AC freq high, low Grid frequency out of range If this happens often, contact installer.
Red AC phase jump Disconnect: fast frequency fluctuations If often, contact your installer.
Red AC quality Disconnect due to bad grid quality If often, contact your installer.
Red No grid No grid available Check the fuses.
Red AC volt low, high Grid voltage low, high If often, contact your installer.
Red TR AC volt high Transient AC voltage high If often, contact your installer.
Red SL AC volt high Grid voltage high for 10 minutes If often, contact your installer.
Red A C Phase Balance Grid phase balance out of range If often, contact your installer.
Red, slow blink Reclosure Time Reclosure time counting Nothing, reclosure may take 5 minutes.
White ON Normal operation
HW Error Refer to StringMaster manual.
OC Over current: Installation error Check cabling and scheme.
NEG Reverse polarisation Check string polarisation.
Warning. Refer to section 8.7 for warning decriptions.
No display function
HW …\...
HW insulation
Temperature high
Sol 1,2 high
Solar low
AC not connected and:
1. insufficient irradiation
2. DC switch in Off position
3. DC fuse blown
4. No PV power (voltage out of range)
Hardware problem
Isolation fault. Resistance between DC
and PE is too low.
Disconnect due to too high internal heat
sink temperature
Solar input 1 and/ or 2 over voltage (DC
> 1000 V). Inverter may be damaged.
Solar 1 and 2 voltage low due to low
irradiation. Inverter has shut down.
If no display appears during daytime,
contact your installer.
Move DC switch to the ON position.
Check string fuses.
The DC voltage should be 200-1000V.
Contact your installer.
Check the PE connections.
The inverter will start up again as soon
as It has cooled down.
Check PV array open circuit voltage,
check OVP in your StringMaster
Contact your installer.
Check: string fuses, DC switch, DC
cable. Wait till sunrise.
White
White
White
ON, Derating
ON, Pwr Mgmt xx%
xx ranges 100, 60,
30, 0
ON, Sol1 Low , Sol2
Low
Not Connected
LOW
OVP 1 (2)
Power Reduction due to: 1. internal tem-
perature, 2. fan failure (max. 75% load
then), 3. DC voltage <350V or >800V, 4.
Lower AC voltage.
Power reduction by request of the grid
operator (via DataControl Premium/ Pro
II). Range 0% (no power), 30%, 60% and
100% (maximum power).
Solar input voltage 1 and/ or 2 low.
The inverter is still operating.
StringMaster has no connection to
MasterBus. StringMaster has not been
configured.
Performance (current) low
Over Voltage Protection of Input 1 or 2
Check the fan, MasterBus power
setting and the voltages.
Check the string fuses, DC switch if
applicable, DC cable; wait till sunrise.
Check MasterBus cabling and
MasterBus configuration.
Check fuse, cabling, irradiation
of PV modules (shadows spoil the
performance).
Check Input 1 or 2 varistor.
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