Expansion Possibilities; Fault Diagnosis And Troubleshooting - Steca Solarix PI 550 Instructions De Montage Et De Service

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7.2 Expansion possibilities

Up to 4 Steca PI inverters can be connected in parallel via a parallel switch box
when the system is extended or when additional consumer devices are connected.
The parallel switch box also allows communication with Steca Tarom or Steca
Power Tarom charge controllers. This allows the PV system to be controlled de-
pending on SOC (State of Charge).
Please refer to the separate PAx4 operating instructions for more information.
(www.stecasolar.com)
8

Fault diagnosis and troubleshooting

Error Cause
LED blinks red • System error
slowly
LED blinks red • Overcurrent
quickly
LED illuminates • Overheating
red permanently
LED blinks red-green • Battery undervolt-
slowly age or low charge
state
LED blinks red-green
• Battery overvoltage
quickly
Noise • Fan switched on
• Load reversal
Inverter switches off • Power consumption
when a consumer too large
device is switched
on
• Battery charge level
too low
Explanation:
Blinking slowly: 1 s on / 1 s off
Blinking red/green slowly: 1 s red / 1 s green
Blinking red/green quickly: 0.1 s red / 0.1 s green
746.489 | 12.41
Remedy
Inform your installation
X
company and have them
check the system
Switch off the consumer
X
devices
Switch off the consumer
X
devices
Charge the battery
X
System error
X
Wait until the temperature
X
conditions have normalized
Switch off the consumer
X
devices
Technical aspect, no error
X
Use an inverter with a higher
X
performance (parallel con-
nection)
Recharge the battery
X
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