5
If there is a fault and it is safe to access the inverter:
1. Read/record the fault code(s) displayed on the APP interface.
2. Turn OFF the inverter via the APP or Remote access.
3. Turn OFF the AC feed breaker.
4. Turn OFF the AC Switch.
5. If possible, read the DC MPPT currents displayed on the APP interface:
a. If the MPPT current is <125A or the irradiation is obviously low, turn
OFF the DC switch.
b. If it is safe to open the wire-box, proceed with troubleshooting
procedures listed in Table 6-2. Make sure appropriate safety
precautions and PPE are used.
6. If it is not possible to read the DC MPPT currents through the APP interface,
and no fire, smoke or voltage (AC or DC) to ground is present in the
enclosure:
a. Follow general safety practices including PPE to open the wire-box.
b. Measure the DC current on each string. If zero, open the fuse holder
for each string reading approximately zero amps.
c. If the DC current is >0.25A, do not open the fuse holder.
d. When all possible fuse are open, measure the total MPPT current. If it
is <125A, turn OFF the DC switch.
e. If turning OFF the DC switch causes smoke, then (if safe) turn the DC
switch back ON and wait until low irradiation ~30min prior to sunset to
continue troubleshooting.
If there is a fault and it is unsafe to access the inverter:
1. Notify someone else. Initiate emergency mitigation plan if necessary. a. If
smoke or fire exists, procure a fire extinguisher.
2. If a fire has escaped the inverter enclosure – notify 911 immediately!
3. Turn OFF the AC feed breaker as soon as possible/safe.
4. If safe but conditions are deteriorating, consider: a. Using the fire
extinguisher. b. Cutting the string conductors – one cable at a time with
insulated cutters (while wearing appropriate PPE).
5. Monitor conditions until low irradiation ~30min prior to sunset. If safe, turn
OFF AC and DC switches on the inverter and proceed with normal
troubleshooting procedures listed in Table 6-2.
WARNING: The DC Switch is rated to break loads under normal
operating conditions. However, a DC short circuit could be hazardous
and the following procedures should be followed before turning OFF
the DC Switch under fault conditions.
Summary of Contents for SCH Series
Page 2: ......
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Page 43: ...39 Figure 3 25 AC Output Cable Connection Distributed Wire box L1 L2 L3 ...
Page 45: ...41 Figure 3 27 AC Output Cable Connection Centralized Wire box Ver 2 ...
Page 58: ...54 Figure 4 1 System setting ...
Page 81: ...77 5 4 2 6 Others The REF column is reference to Table 5 7 Enable functions ...
Page 90: ...86 WiFi to Inverter ...
Page 92: ...88 ...
Page 93: ...89 5 5 History There are 2 submenus in the History menu Alarm and Running Status ...
