SANCH S900-4T3.7G - User Manual

Questions and Answers

S
Stacy OconnorAug 10, 2025
What to do if SANCH Inverter detects over current at output side?
- A
  Andrea McbrideAug 10, 2025
  If the SANCH Inverter detects an overcurrent at the output side, take the following steps: 1. Verify that the motor's rated current matches the AC motor drive's rated current. 2. Ensure there are no short circuits in U/t1-V/t2-W/T3. 3. Confirm that there is no short circuit or grounding in the motor connection. 4. Make sure the screws are securely tightened to the AC motor drive. 5. Increase the acceleration time (parameters 1-09, 1-10). 6. Check that the motor is not overloaded.
E
Eric HessAug 16, 2025
What to do if output current exceeds allowable current of SANCH S900-4T3.7G Inverter?
- M
  Mark RuizAug 16, 2025
  If the output current exceeds the allowable current of your SANCH Inverter, consider the following: 1. Check if the motor is overloaded. 2. Decrease the torque (parameter 7-02) to improve the set value. 3. Increase the output capacity of the AC motor drive.
B
Brittany TaylorAug 21, 2025
How to fix SANCH Inverter over heat?
- M
  margaretbrooksAug 21, 2025
  If the SANCH Inverter detects overheating and exceeds the protection level: * Ensure the ambient environment is not overheating. * Check that the radiator and air fan are functioning correctly. * Verify that there is enough clearance for airflow around the AC motor drive.
J
Jacob DelgadoAug 27, 2025
What to do if inner electric relay protection acts in SANCH S900-4T3.7G Inverter?
- J
  Jessica BakerAug 27, 2025
  If the inner electric relay protection in your SANCH Inverter activates, take these steps: 1. Check for motor overload. 2. Verify that the motor's rated current (parameter 07-00) is correct. 3. Check the electric relay function setting. 4. Increase the motor capacity.
G
gutierrezmargaretSep 2, 2025
What to do if DC high voltage side over low inside SANCH S900-4T3.7G?
- P
  Phillip JohnsonSep 2, 2025
  If the DC high voltage side inside your SANCH Inverter is too low: * First, check that the power supply voltage is correct. * Second, ensure there is no sudden heavy load.

Summary

Manual Service For S900 Series Inverters

1 SAFETY INSTRUCTIONS

1.1 NOTES FOR OPERATION

Essential guidelines and warnings for safe inverter operation before, during, and after use.

1.2 NOTES FOR OPERATION ENVIRONMENT

2 DESCRIPTIONS FOR SANCH AND INSTALLATION

2.1 OPERATION ENVIRONMENT

2.6 Basic Wiring Diagram

Illustrates the main circuit and control circuit connections for the S900 series inverter.

3 DESCRIPTION OF OPERATORS

3.1 DESCRIPTION FOR DIGITAL OPERATOR

Details the display and operating space of the digital operator and its components.

3.2 DESCRIPTION OF KEYBOARD OPERATION

Illustrates common operations like scene selection, configuration, data modification, and steering setup.

4 LIST OF DESCRIPTIONS FOR FUNCTIONAL PARAMETERS

1 Basic Parameters

Core settings for operation frequency, voltage, acceleration, and deceleration times.

2 Operation Mode Parameters

6 Protection Parameters

Settings for over-voltage, over-current, and over-torque protection functions.

7 Motor Parameters

6 TROUBLE SHOOTING

6.1 Fault and corrective measures

Lists common fault displays (e.g., OC, OV, OH) with their causes and corrective actions.

SANCH S900-4T3.7G Specifications

General

Power	3700W
Input Voltage	12V DC
Output Frequency	50Hz
Efficiency	90%
Cooling	Fan
Protection	Overload, Short Circuit, Over Temperature
Operating Temperature	-10°C to 40°C