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Mitsubishi FREQROL-SF - How to replace the E2 PROM; 2.1 Replacing fuses; 2.2 Replacing thermal protectors; 2.3 Replacing amplifier cooling fan

Mitsubishi FREQROL-SF
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1.3.11
The speed detection signal, up to speed signal, or zero
speed signal is not issued.
Item
Cause
Check
Remedy
The motor does not
ro-
D
Check that the external
o
In the same manner as
Sec-
tate.
signal 4
(STSZ)
bit 2 (SD
tion 1.3.4,
take the
re-
speed detection) or bit 5
quired countermeasures.
1
(UTS
up to speed) is not
turned on in the diagnosis
mode on the status display.
(See Section
1.1.1(21.)
The motor speed does not
D
In the same manner as the
0
In the same manner as
Sec-
2
accord with that being
Item 1 above, check the
tion 1.3.5,
take the proper
specified. related signal.
countermeasures.
The output circuit of
o
Check that the external
o
Replace the SF-CA card with
the SF-CA card is
defec-
signal 4
(STSZ)
bit 2 (SD
a new one.
3
tive.
speed detection), bit 5
(See Section 2.4.4.)
(UTS
up to speed), or bit 4
(2s
zero speed) is turned on.
The cable which is
con-
o
In the same manner as the
o
Replace the cable with a ner
netted
to the connector
Item 3 above,
check that the
one.
4
CON3 is defective.
external signal 4 bit 2, bit
5, or bit 4 is turned on in
the diagnosis mode of the
status display.
-
54
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