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14
Replace the Driver
Board or SRB
Replug the
terminal
U02
The Driver Board
or SRB is bad
The terminal
is loose
The signal of
Driver Board
is abnormal
Check the signal
wires of the
Driver Board
and SRB(CN10)
is loose
Yes
Not
Replace
the Motor
Replace the
Driver Board
U21/
U26
The Motor is bad
The Driver
Board is bad
Motor
vercurrent/
Motor phase loss
Check the
resistance
between three
phases of the
motor is normal
Yes
Not
The Inverter
is bad
Yes
Check the fault
is eliminated
Replace the
Magnetron
E-1
Replace the
Inverter
The Magnetron
is bad
Inverter
leakage
Check the
Magnetron is
normal
Yes
Not
Replace the
SRB relay
(RLY1/RLY5)
Replace the
Interlock
assembly
Replace the
Inverter
Check the
Interlock
assembly
is normal
Check the
SRB relay
(RLY1/RLY5)
is normal
Check
Inverter
is normal
Yes
Yes
Yes
Not
Not
Not
Replace the
Magnetron
Replace the
Fuse 2
E-5
Check the
Magnetron
is normal
The Fuse
2 is bad
Inverter No
output
Check the
Fuse 2 is normal
Yes
Not
Not
Replace
the Inverter
Replace the
Magnetron
E-6
Check
Inverter
is normal
The Magnetron
is bad
The current Is
too large in the
magnetron
Check the
Magnetron
is normal
Yes
Not
Not