Support

The EC160 control board reports E30. Can the problem be solved by replacing the control board, driver board, and IGBT?

 No, because E30 is a safety circuit fault. E30 is usually caused by an issue with an external switch and has nothing to do with the control system. This is because the elevator's external safety switch is in an open state, and the system cannot detect the safety signal, thus triggering an alarm.First check the safety switches outside the elevator to see if they are disconnected or damaged.

A drainage malfunction occurs when the high-water level float valve inside the drain pan fails to drop. Please troubleshoot the following potential issues:
Check if foreign objects are blocking the high-water level float valve and preventing it from lowering.
If the unit is equipped with a condensate pump: first verify whether the condensate pump is functioning properly. Next, check for trapped air in the pipeline connecting the drain pan to the condensate pump — in other words, confirm if the pump’s inlet is fully filled with water.

For GD5000 products, after the motor is self-learning, how to deal with inaccurate motor parameters?  

This situation does exist. First use the workshop's motor parameter estimation tool, type in the basic parameters on the motor nameplate, and then calculate the stator-rotor resistance, self-inductance, leakage inductance, and mutual inductance of the motor, and then conduct self-study.Compare the estimated value and the learning value of the P2 group. If the difference is large, you can reset the motor parameters of the P2 group, relearn, and then compare again; if the difference is not large, perform VF, SVC mode start and stop, if it is no problem.

 In the GD300-01A-RT, for the P29 group of manufacturer parameter sets, if the inverter power is set according to the motor nameplate, will this prevent my GD300 from reporting dev and sto faults during internal testing and actual operation? Is this feasible?

It is not feasible. Setting the inverter power according to the motor nameplate will affect the accuracy of current detection, thereby making it more likely to trigger the occurrence of other faults. Additionally, the manufacturer's parameter group cannot be changed at will; if modification is necessary, it must be authorized by INVT engineers.

 The Start/Stop commands should be available from two sources: the DCS and the local motor control box located beside the motor.There is no priority level for the two methods because it is a pulse signal, so there is no command conflict.

What are the alarm and fault temperature thresholds for the power units of the GD5000 product? What are the over-temperature alarm and fault thresholds for the phase-shifting transformer? 

1. Power unit: Alarm at 75°C or higher; trip at 85°C or higher; 

2. Phase-shifting transformer: Factory default is an alarm at 90°C or higher; we have observed a trip at 110°C. These values can be configured in P23.05 and P23.06.

 Cause analysis:
1. The encoder is not connected, or the encoder connector is loose.
2. One of the encoder signal wires (U, V, W, A, B, Z phases) is broken.
3. Encoder A/B phase signals are reversed.
4. Communication interruption or data abnormality caused mainly by noise interference.
Troubleshooting measures:
1. Check whether the encoder wiring is correct and whether the connector is firmly plugged in.
2. Verify that the encoder supply voltage is normal.
3. For incremental encoders, manually rotate the motor and observe parameter R2.50 (encoder Hall UVW value). Under normal conditions, the value should cycle between 1 and 6. If it shows 0 or 7, a broken wire is indicated.
4. Reduce interference on the encoder cable by routing the encoder cable separately from the motor power cable, and connect the encoder shield wire to the drive's FG terminal at one end only.

How to handle the situation where the air conditioner screen has backlight but shows a black display?
Troubleshooting steps:
1-Connect a computer to the screen's network port, and set the computer's IP address to the same subnet as the screen.
2-Open the command prompt on the computer and ping the screen's IP address. If you receive a reply, it means the main program is reachable; you can then proceed with upgrading the program.
3-If the ping fails, it indicates that the main program is frozen. In this case, flash (reprogram) the firmware directly. If the issue persists after flashing, the screen needs to be replaced.

If an overcurrent alarm occurs during acceleration or deceleration, which inverter parameters should be analysed, and what is the most effective solution?
A: You should check P00.11 (acceleration time) and P00.12 (deceleration time).
Overcurrent alarms during acceleration or deceleration are usually caused by acceleration or deceleration times being too short; therefore, you need to increase the acceleration time (P00.11) or the deceleration time (P00.12).