Mitsubishi Electric FR-F740 EC Instruction Manual page 123

Operation
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 5.3.)
– Check for the Pr. 79 setting once again. (Pr. 79 must be set to "0" or "2".) (Refer to
section 5.7.)
– 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 FWD or REV 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.)
● How is the frequency setting from 4 to 7 speed?
– The setting differs according to Pr. 24 to Pr. 27 (multi-speed setting). (Refer to
section 6.5.1).
● How is a multi-speed operation higher than 8 speed performed?
– Use the REX signal to perform the operation. (Refer to section 6.5.1).
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-F700 EC
External operation
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