CMS 2000 Error and Fault Messages

If you have CMS 2000 or CMS 1500 solar inverter that is displaying an error message or a red light check out the table below to find out what the message means. Unfortunately the manufacturer of these inverters are not honouring any warranties, so an error message may possibly mean you are up for some money to get your solar power system operational again. Click here for more information.

CMS 1500 and CMS 2000 Fault and Error Messages

Operating Message	Message in English	Description
System Fault & Error Messages
Isolation fault	Isolation failure	Earth fault on the solar panels or failure of surge protection
Ground I Fault	GFCI active	Leakage current to ground is too high
Grid fault	Grid failure	Grid measured data is beyond the specification (voltage & frequency)
No utility	No utility	Utility is not available
PV over voltage	Input voltage too high	Input voltage from the solar panels higher than the max input voltage
Inverter Fault and Error Messages
Consistent fault	Consistent failure	The readings of 2 microprocessors are not consistent. CPU and/or other circuit not functioning may be the cause.
Over temperature	Temperature too high	The internal temperature is higher than the normal value
Relay failure	Output relay failure	The relay between the inverter and grid is not functional
DC INJ High	Output DC injection too high	Output DC injection is too high
EEPROM failure	EEPROM problem	EEPROM inside the inverter has a data access problem
SCI failure	Problem with communication between microprocessors	The communication between MCU inside the inverer is abnormal
High DC Bus	DC bus voltage is too high	The DC Bus inside is higher than expected
Low DC Bus	DC bus voltage is too low	The DC bus inside is lower than expected
Ref 2.5V Fault	2.5V reference voltage inside problem	The 2.5V reference inside the inverter is abnormal
DC Sensor Fault	Output DC sensor abnormal	The DC output sensor is abnormal