Goodwe NS Series User Manual

© copy right reserved by GoodWe
◆ ISO Failure
Error Code: 14
Cause: Inverter detects ground insulation impedance is too low
Measurement:
A. Check the time when inverter goes fault, if it is at dawn/ dusk or rainy days. Please ignore
this fault. As the humidity goes high, the impedance will become low, which will lead to
ISO failure;
B. Measure the impedance of PV+ & PV- to ground, the values should be higher than 2MΩ. If
the impedance is too low, please check the insulation, or rewiring the PV connection;
C. Measure the impedance of N to ground, the value should close to zero. If not, please
check the AC wiring.
D. Check if the firmware version of the inverter is the latest. As with the time goes, threshold
in the firmware are also changing. If not the latest, please update the firmware;
E. If all above don’t work, please contact with GoodWe local service center.
2.4 Trouble Shooting

Goodwe NS Series Specifications

General

Protection Degree	IP65
Number of MPP Trackers	2
Cooling	Natural Convection
Power Range	3kW to 6kW
MPPT	Dual MPPT
Communication	WiFi
MPPT Voltage Range	120-500V
Nominal AC Output Power	3000W to 6000W
Max. AC Output Power	3.3kW, 4kW, 4.6kW, 5.5kW, 6.6kW
Nominal Output Voltage	230V
Operating Temperature Range	-25 ~ +60 °C
Output Power	3000W to 6000W
MPPT Range	120-500V
Output Voltage	230V
Frequency	50/60 Hz