Note:
Never use any solvents, abrasives or corrosive materials to clean the inverter.
CAUTION:
Do not touch the surface when the inverter is operating. Some parts may be hot
and cause burns. Turn OFF the inverter (refer to Section 6.2) and let it cool down
before you do any maintenance or cleaning of inverter.
The LCD and the LED status indicator lights can be cleaned with cloth if they are too dirty
to be read.
The inverter has been designed in accordance with international grid tied standards for
safety, and electromagnetic compatibility requirements. Before delivering to the customer
the inverter has been subjected to several tests to ensure it’s optimal operation and reliability.
Canadian Solar Three Phase Inverter does not require any regular maintenance. However,
cleaning the heat-sink will help in dissipating heat and increase the life time of inverter.
The dirt on the
inverter can be cleaned with a soft brush.
9
.
Troubleshooting
In case of a failure the LCD screen will display an alarm message. In this case the inverter
may stop feeding energy into the grid. The alarm descriptions and their corresponding alarm
messages are listed in Table 9.1:
8. Maintenance
9
.
Troubleshooting
.44.
.
.
45
Alarms
Cause
Solution
• Input voltage low/missing
• Polarity reversed
• Main board damaged
No Information
(Blank Screen)
Test – DC switch OFF
• Check PV connections
• Check polarity
• Check voltage >120V Single, >350V three
Test – DC Switch ON
• Check voltage >120V Single, >350V three
• If DC voltage is “0” replace inverter
Initializing
(Inverter stuck
in this mode)
• Inverter is waiting for
driving signal
Test – DC switch OFF
• Check PV connections
• Check polarity
• Check voltage >120V Single, >350V three
Test – DC Switch ON
• Check voltage >120V Single, >350V three
• A cable may have been damaged or loosened
in shipping replace inverter
OV-G-V: Over
Grid Voltage
• Inverter detects grid
voltage as too high
• 228VAC for 208V mode
• 264VAC for 240V mode
Test – DC switch OFF
• Check AC at the inverter
• If AC measures high, adjust upper limit with
permission from utility
Test – DC Switch ON, full power
• Check AC at inverter test points
• Compare with LCD
• If AC measures high, cables between inverter
and interconnect are too small
• Check ampacity and voltage drop calculations
UN-G-V: Under
Grid Voltage
• Inverter detects grid
voltage as too low
• 183VAC for 208V mode
• 211VAC for 240V mode
Test – DC switch OFF
• Check AC at the inverter test points
• If AC measures low, adjust lower limit with
permission from utility
• Check LCD voltage reading, may be a bad
measurement circuit
Test – DC Switch ON
• Check grid standard
• Replace inverter
