Mitsubishi Electric FR-D720S SC EC Instruction Manual page 143

Fr-d700 series
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Basic settings
Possible faults:
● The EXT lamp is not lit even when the PU/EXT key is pressed.
– Switchover of the operation mode with is valid when Pr. 79 = 0 (initial value).
● 50Hz, 30Hz and 10Hz are not output from RH, RM and RL respectively when they are turned on.
– Check for the setting of Pr. 4, Pr. 5, and Pr. 6 once again.
– Check for the setting of Pr. 1 "Maximum frequency" and Pr. 2 "Minimum frequency" once
again. (Refer to section 5.1.4.)
– Check for the Pr. 79 setting once again. (Pr. 79 must be set to "0" or "2".) (Refer to
section 5.1.6.)
– Check that Pr. 180 "RL terminal function selection" = "0", Pr. 181 "RM terminal function
selection" = "1", Pr. 182 "RH terminal function selection" = "2" and Pr. 59 "Remote function
selection" = "0". (All are initial values.)
● The RUN lamp is not lit.
– Check that wiring is correct.
– Check that "60" is set in Pr. 178 "STF terminal function selection" or "61" is set in Pr. 179
"STR terminal function selection". (All are initial values.)
NOTE
External operation is fixed by setting "2" (external operation mode) in Pr. 79 "Operation
mode selection" when you do not want to take time pressing the PU/EXT key or when you
want to use the current start command and frequency command.
FR-D700 SC EC
External operation
5 - 35

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