Nothing Appears On The Monitor; Abnormal Motor Operation - Fuji Electric FRENIC-HVAC User Manual

9.4 Nothing appears on the monitor

9.4.1

Abnormal motor operation

[ 1 ] The motor does not rotate.
Possible Causes
(1) No power supplied to the
inverter.
(2) No forward/reverse operation
command was inputted, or
both the commands were
inputted simultaneously
(external signal operation).
(3) No indication of rotation
direction (keypad operation).
(4) The inverter could not accept
any run commands from the
keypad since it was in
Programming mode.
(5) A run command with higher
priority than the one attempted
was active, and the run
command was stopped.
(6) No analog frequency
command input.
What to Check and Suggested Measures
Check the input voltage and interphase voltage unbalance.
 Turn ON a molded case circuit breaker (MCCB), a residual-current-
operated protective device (RCD)/earth leakage circuit breaker
(ELCB) (with overcurrent protection) or a magnetic contactor (MC).
 Check for voltage drop, phase loss, poor connections, or poor
contacts, and fix them if necessary.
 If only the auxiliary control power input is supplied, also supply the
main power to the inverter.
Check the input status of the forward/reverse command with Menu "I/O
Checking" using the keypad.
 Input a run command.
 Set either the forward or reverse operation command to off if both
commands are being inputted.
 Correct the run command source. (Set F02 data to "1.")
 Correct the assignment of commands FWD and REV with function
codes E98 and E99.
 Connect the external circuit wires to control circuit terminals [FWD]
and [REV] correctly.
 Make sure that the sink/source slide switch (SW1) on the control
printed circuit board (control PCB) is properly configured.
Check the input status of the forward/reverse rotation direction command
with Menu "I/O Checking" using the keypad.
 Input the rotation direction (F02 = 0), or select the keypad operation
with which the rotation direction is fixed (F02 = 2 or 3).
Check which operation mode the inverter is in, using the keypad.
 Shift the operation mode to Running mode and enter a run command.
Referring to the block diagram of the frequency command block (refer to
Chapter 7), check the higher priority run command with Menu "Data
Checking" and Menu "I/O Checking" using the keypad.
 Correct any incorrect function code data settings (in H30, y98, etc.)
or cancel the higher priority run command.
Check whether the analog frequency command (reference frequency) is
correctly inputted, using Menu #4 "I/O Checking" on the keypad.
 Connect the external circuit wires to terminals [13], [12], [11], [C1],
and [V2] correctly.
 When the terminal [C1] is used, check the slider position of the
terminal [C1] property switch (SW5) and the setting of the thermistor
mode selection (H26).
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