"HO" or "PLEASE WAIT" displayed on remote, unit unresponsive.

What does HO / PLEASE WAIT mean?

The remote controller continuously displays "HO" or "PLEASE WAIT" and the air conditioning unit does not operate. This message should typically clear within 5 minutes after the unit is powered on.

• No power supplied to the M-NET transmission line
• Short-circuited or incorrectly wired M-NET transmission line
• Disconnected remote controller wires
• Incorrect sub/main setting on the remote controller
• Multiple main remote controllers connected
• Faulty circuit board or remote controller

Click steps to track your progress.

1. 1

   First, ensure the main power to the entire system has been on for at least 5 minutes.

2. 2

   Check the self-diagnosis LED for error code 7102, which would indicate a transmission line issue requiring specific troubleshooting.

3. 3

   Inspect all M-NET transmission line wiring for proper connection, ensuring no short circuits, disconnected wires, or incorrect wiring (e.g., reversed daisy-chain).

4. 4

   Verify the settings of your MA remote controller(s); ensure only one is set as "main" and others as "sub" if applicable.

5. 5

   A qualified technician should measure the voltage at the M-NET transmission line terminal block (TB5), which should be between DC 17-30V.

6. 6

   If wiring and settings are confirmed correct, the remote controller or its communication circuit on the main board might be faulty.