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DSP 3320i-ODS, DSP 3325i-ODS, DSP 3333i-ODS
User manual
Follow-up Procedure
To remove the positive and negative connectors from the DASS TECH inverter, insert a
removal wrench into the bayonet and press the wrench with an appropriate strength, as
shown in Figure 4-29.
Before removing the positive and negative connectors, ensure that the DC
SWITCH is OFF.
Caution
Figure 4-28 Removing a DC input connector
4.6 Safety check
Photovoltaic array
Before the inverter operation, need to be examined for the photovoltaic array, Check Open
circuit voltage of the each PV array whether accord with the requirements.
− Ensure Open circuit voltage of the each PV array accord with the requirements;
−
Ensure that the positive and negative polarity is correct.
DC
connect
DASS TECH inverter
Use the multimeter to check the DC side voltage and current;
Check the DC cable， Note the positive and negative poles cannot be reversed, Consistent
with the positive and negative pole of photovoltaic array, measured each input Open circuit
voltage
Compare the voltage, if the difference is greater than 3%, PV array line may be a fault
DASS TECH inverter AC connect
Ensure the AC breaker of the inverter is off
Check the inverter phase with grid is connected properly, Check the voltage of each phase is
within a predetermined range, if possible, Measure the THD, If the distortion is serious, the
inverter may not work.
Installing cover and Locking screw.
Figure4-29 NOT allowed: connect loads between inverter and circuit breaker
Load
DSP 3320i-ODS, DSP 3325i-ODS, DSP 3333i-ODS
User manual
5.1 Safety inspection before commissioning
Attention
5.2 Start inverter
Step 1 Turn on DC switch.
Step 2 Turn on AC switch.
When the solar arrays generate adequate power, the inverter will startup automatically.
Display showing "normal" indicates correct operation.
Step 3: Choose the correct country code. (refer to section 6.3 of this manual)
Notice: Different distribution network operators in different countries have
different requirements regarding grid connections of PV grid connected
inverters.
Therefore, it's very important to make sure that you have selected the correct
country code according to requirements of local authority.
Please consult qualified electrical engineer or personnel from electrical safety
authorities about this.
DASS Tech Co., Ltd is not responsible for any consequences arising out of
incorrect country code selection.
If the inverter indicates any other fault, please refer to part 7——error messages for help.
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5
Commissioning of inverter
Ensure that DC and AC voltages are within the range permitted by the
inverter.
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