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SPAZIO FORMA: Service & Maintenance manual - rev. 1.0
6.4.10. T
HE INVERTER IS OFF
Replace CN39 connector
Follow the procedure step by step to correctly diagnose the problem. Take particular care with the
checks highlighted by circled numbers, which are described in detail below:
(1)
Place the tester probe between terminals L1 and N on the inverter. The measured value should
be 220 VAC.
(2)
Place the tester probe between fastons 2 and 6 of the K1 relay on the power isolating board.
The measured value should be 220 VAC.
(3)
Place the tester probe between fastons 4 and 8 of the K1 relay on the power isolating board.
The measured value should be 220 VAC.
(4)
Place the tester probe between terminals L and N on the CN39 connector. The measured
voltage should be 220 VAC.
INVERTER OFF
Is the power supply at the
inv erter input OK?
NO
Is the power supply v oltage
output by the relay correct?
NO
Is power supply v oltage
reach by the relay correct?
NO
NO
Is the supply v oltage at the
CN39 connector correct?
1
YES
Replace the inv erter
2
YES
Replace the SF-4A cable
3
YES
Carry out rhe procedure
"The power isolating board
is not working"
4
YES
Replace the SF-4B cable
Page 6.23
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