Before Proceeding With Troubleshooting - Fuji Electric FRENIC-HVAC User Manual

9.2 Before Proceeding with Troubleshooting

If any of the protective functions has been activated, first remove the cause. Then, after checking that the
all run commands are set to OFF, release the alarm. If the alarm is released while any run commands are
set to ON, the inverter may supply the power to the motor, running the motor.
Injury may occur.
• Even though the inverter has interrupted power to the motor, if the voltage is applied to the main circuit
input terminals L1/R, L2/S and L3/T, voltage may be output to inverter output terminals U, V, and W.
• Turn OFF the power, and after at least ten minutes have elapsed, use a multimeter or similar instrument
to ensure that the DC link bus voltage between the terminals P (+) and N (-) has dropped to a safe level
(+25 VDC or below).
Electric shock may occur.
Follow the procedure below to solve problems.
(1) Is the inverter correctly wired?
Refer to Chapter 2, Section 2.10 "Connection Diagram".
(2) Is an alarm code displayed on the LCD monitor?
● If alarm code displayed
● Abnormal motor operation
● Problems with inverter settings
●If Other than an Alarm Code is Displayed
If any problems persist after the above recovery procedure, contact your Fuji Electric representative.
9-2
Go to Section 9.3.
Go to Section 9.4.1.
Go to Section 9.4.2.
Go to Section 9.5.