DSP-338i-ODS
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DSP-338i-ODS
User manual
DSP-338i-ODS
User manual
If the alarm occurs occasionally, the possible cause
is that the electric grid is abnormal occasionally.
DASS TECH inverter automatically returns to
normal operating status when the electric grid’s back
to normal.
If the alarm occurs frequently, check whether the
grid voltage/frequency is within the acceptable
range. If no, contact DASS TECH technical support.
If yes, check the AC circuit breaker and AC wiring
of the DASS TECH inverter.
If the grid voltage/frequency is within the acceptable
range and AC wiring is correct, while the alarm
occurs repeatedly, contact DASS TECH technical
support to change the grid over-voltage, under-
voltage, over-frequency, under-frequency protection
points after obtaining approval from the local
electrical grid operator.
Check whether too few PV modules are series
connected in a PV string, thus the voltage(Vmp) of the
PV string is lower than the minimum operating
voltage of DASS TECH inverter. If yes, adjust the
number of series connected PV modules to increase
the voltage of the PV string to fit the input voltage
range of DASS TECH inverter. DASS TECH inverter
automatically returns to normal operating status after
correct adjustments.
Check whether too many PV modules are series connected in
a PV string, thus the voltage(Voc) of the PV string is higher
than the maximum input voltage ofDASS TECH inverter. If
yes, adjust the number of series connected PV modules to
decrease the voltage of the PV string to fit the input voltage
range of DASS TECH inverter. DASS TECH inverter
automatically returns to normal operating status after correct
adjustments.
Check the input mode(parallel mode/ independent
mode) setting of DASS TECH inverter according to
Section 4.5 of this user manual.
If the fault occurs occasionally, the possible cause is
that the external circuits are abnormal occasionally.
DASS TECH inverter automatically returns to
normal operating status after the fault is rectified.
If the fault occurs frequently and lasts a long time,
check whether the insulation resistance between the
PV array and earth(ground) is too low, then check
the insulation conditions of PV cables.
Check whether the input current is higher than the
maximum input current of DASS TECH inverters,
then check the input wiring, if both are correct, please
contact DASS TECH technical support.
ID15-ID24 are internal faults of
inverter, turn OFF the “DC switch”, wait for 5
minutes, then turn ON the “DC switch”. Check
whether the fault is rectified. If no, please contact
DASS TECH technical support.
DASS TECH
