Service Manual
PH1800 PLUS 4K/5K
- 3 -
2. Fault and Troubleshooting
No LCD
display when
inverter turns
on
First to test battery volt to check whether it is in range of 44v-52v;
If it is in the range, to switch the inverter one to check whether the
unit starts. If the unit does not run yet, please disconnect all
connections and open the surface panel, take out the main board,
then to check and repair according to 3.7
01
First to replace the fan, to check whether it is okay; if NG, please
inspect the main board and repair according to 3.11
02
Please to check the main board and repair according to 3.9
03
Please to check first and then to repair the main board according
to 3.1, 3.6 and 3.7
06
First to start up the inverter by only connecting battery, if the fault
is still on, please inspect the main board following 3.4
08
To restart the inverter, to check whether the fault repeats, if yes, it
requires to replace the control boards.
09
To Check the main board following 3.1.2, 3.2.1, 3.4.1 and 3.5 and
to repair accordingly
52
First to restart inverter by only connecting to battery, if fault
continues, then to check the main board according to 3.1.2 and
3.4
56
First to check the connection of battery cable, if good connection,
then please to check and repair the main board following 3.1.1
and 3.1.2 accordingly
57
To replace the control board
58
First to restart inverter by connecting battery only, to check
whether it is good?
Second to connect battery and Utility but to keep switch off,
checking whether inverter charges battery? Otherwise, to check
and repair main board according to 3.1.2, 3.2.1 and 3.4.1
accordingly
72
To replace the control board