16
connected to the CN104/CN105 on the PSDR board via the
power cord of the charger and then make sure that the other
connections are correct; For the standard model, there is no
power cord. Replace the charger board if the BUS voltage is
normal.
IP Fuse
Open
The Warning code
is “24”;
The buzzer beeps
every second.
Check the IP fuse. If the IP fuse is damaged, replace the fuse
immediately.
7.5 PCB maintenance
1. Charger board
1.1 Charger board
（
standard model
）
:
Item
Checked components
DVM function
Reference Value
Fail Condition
1
F901, F902, F903,
F904, F905, F906,
Ω
0
Ω
open
(S, D)
Ω
≈
1.7M
Ω
short
2 Q907,Q908,
(G, S)
Ω
32
Ω
short or open
3
D901, D902, D903
DIODE
≈
0.4V
0V
(A, K)
Ω
≈
20M
Ω
short
4 Q909
(G, K)
Ω
≈
42
Ω
short
