CMS 2000 Fault and Error Messages

CMS 2000 Fault & Error 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.

CMS 1500 and CMS 2000 Fault and Error Messages

Operating Message
Message in English
System Fault & Error Messages
Isolation faultIsolation failureEarth fault on the solar panels or failure of surge protection
Ground I FaultGFCI activeLeakage current to ground is too high
Grid faultGrid failureGrid measured data is beyond the specification (voltage & frequency)
No utilityNo utilityUtility is not available
PV over voltageInput voltage too highInput voltage from the solar panels higher than the max input voltage
Inverter Fault and Error Messages
Consistent faultConsistent failureThe readings of 2 microprocessors are not consistent. CPU and/or other circuit not functioning may be the cause.
Over temperatureTemperature too highThe internal temperature is higher than the normal value
Relay failureOutput relay failureThe relay between the inverter and grid is not functional
DC INJ HighOutput DC injection too highOutput DC injection is too high
EEPROM failureEEPROM problemEEPROM inside the inverter has a data access problem
SCI failureProblem with communication between microprocessorsThe communication between MCU inside the inverer is abnormal
High DC BusDC bus voltage is too highThe DC Bus inside is higher than expected
Low DC BusDC bus voltage is too lowThe DC bus inside is lower than expected
Ref 2.5V Fault2.5V reference voltage inside problemThe 2.5V reference inside the inverter is abnormal
DC Sensor FaultOutput DC sensor abnormalThe DC output sensor is abnormal
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