Sungrow SG5KTL-MT User Manual page 68

9 Troubleshooting and Maintenance
D D e e s s c c r r i i p p t t i i o o n n
A A l l a a r r m m I I D D
038 Device abnormal
Low ISO resistance
The alarm is generally
caused by poor
039
insulation to ground
from the PV module/
cable or by rainy and
damp environment.
040-042 Device abnormal
Low ambient
temperature
The ambient
043
temperature is below
the normal operation
temperature of the
inverter.
044-046 Device abnormal
PV input s error
047
The PV inputs order is
incorrect.
58
C C o o r r r r e e c c t t i i v v e e M M e e a a s s u u r r e e s s
1. Wait for the inverter to recover.
2. Disconnect the AC and DC switches or
circuit breakers, and connect them again after
15 minutes.
3. If the alarm persists, contact SUNGROW.
Wait for the inverter to recover. If the fault
occurs frequently:
1. Check whether the insulation resistance
protection value is extremely large through the
App, and ensure that it complies with the local
regulations.
2. Check the resistance to ground from the PV
module/cable. Take corrective measures in
case of leading to short circuit or damaged
insulation layer.
3. If the cable is normal and the alarm occurs
on rainy days, check it again when the weather
turns fine.
4. If the alarm persists, contact SUNGROW.
1. Wait for the inverter to recover.
2. Disconnect the AC and DC switches or
circuit, and connect them after 15 minutes.
3. If the alarm persists, contact SUNGROW.
Stop and disconnect the inverter. Restart the
inverter when the ambient temperature is
within the permissible range.
1. Wait for the inverter to recover.
2. Disconnect the AC and DC switches or
circuit, and connect them after 15 minutes.
3. If the alarm persists, contact SUNGROW.
Stop and disconnect the inverter. Reset the PV
inputs order.
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