The elevator five-party intercom system is essential for safety, allowing communication between the duty room, elevator cabin, machine room, top, and bottom of the elevator. If communication fails, safety risks like entrapment can occur. Here are common problems and solutions:

1.Problem: Main/Extension Unable to Answer/Call

Possible Causes:
· Power connection issues
· Poor antenna connections
· Garbled or lost codes
· Manual code/channel changes
Solutions:
· Check power and restart
· Inspect antenna connections
· Resync codes
· Ensure code/channel settings match

2.Problem: Severe Electrical Noise

Possible Causes:
· Cable connected to live electrical lines
· Cable passing through mainboard
Solutions:
· Reconnect wiring properly
· Ensure correct cable connection, without reversing yellow/green wires

3.Problem: The Intercom Is Emitting A High-Pitched Whistle

Possible Causes:
· Intercom not tightly attached
· Too many hard surfaces causing sound reflection
Solutions:
· Reposition the intercom with no obstructions
· Adjust microphone position until communication is clear

4.Problem: The Elevator Cabin Intercom Is Speaking, But The Main Unit Cannot Hear It

Possible Cause:
· Incorrect yellow/green wire connection
Solutions:
· Check intercom wiring
· Test direct connection with extension unit

5.Problem: Main Intercom Only Transmits One Way

Possible Causes:
· Damaged extension unit component
· Antenna misalignment
· Volume knob set too low
Solutions:
· Ensure volume is set correctly
· Test with a working extension unit in the machine room

6.Problem: Low Communication Volume

Possible Causes:
· Low volume setting
· Misaligned microphone hole
· Thin traveling cable
Solutions:
· Adjust volume knob
· Align microphone properly
· Use thicker cables (RVVP2x0.75 or 2×1.0)

7.Problem: Unclear Sound

Possible Causes:
· Obstructed or poorly connected cable
· Installation issues
· Improper volume settings
Solutions:
· Check cable isolation and connection
· Test the intercom directly with extension wires
· Adjust volume on both units

By addressing these issues, you can ensure the elevator intercom system operates effectively, maintaining safety and reliable communication.