• Code: 17
• Description: No Dial Tone There is no dial tone when the On-Hook dial button is pressed.
• Causes: 1. Check that the telephone line cord supplied with the set is connected to TEL LINE correctly. 2. Listen for a CLICK sound when the OHD key is pressed. 3. Check the connection of the HARNESS between the LIU and the Main B'd. 4. Check that the SPEAKER is connected correctly.
• Remedy: 1. If the telephone cord is OK but there is no dial tone, try plugging a normal telephone into the wall socket. I this is OK then replace the LIU B'd. 2. If you cannot hear the OHD CLICK sound, the OPE Ass'y may be defective. Replace the OPE Ass'y. 3. Check the Speaker connection and the harness between the LIU and the Main PBA, replace as necessary. 4. Use Tech mode / Modem Test to check that the speaker and amplifier are working. Replace the Main B'd.

• Code: 18
• Description: Defective MF DIAL The MF DIAL is not functioning.
• Causes: 1. Check that the telephone line cord supplied with the set is connected to TEL LINE correctly. 2. Listen for a CLICK sound when the keKEY is pressed. 3. Check the connection of the HARNESS between the LIU and the Main B'd. 4. Check that the SPEAKER is connected correctly.
• Remedy: 1. If the telephone cord is OK but there is no dial tone, try plugging a normal telephone into the wall socket. I this is OK then replace the LIU B'd. 2. If you cannot hear the OHD CLICK sound, the OPE Ass'y may be defective. Replace the OPE Ass'y. 3. Check the Speaker connection and the harness between the LIU and the Main PBA, replace as necessary. 4. Use Tech mode / Modem Test to check that the speaker and amplifier are working. Replace the LIU and Main B'd in sequence Notes: Product supports MF DIAL type only.

• Code: 19
• Description: Defective FAX FORWARD/RECEIVE FAX FORWARD/RECEIVE is not functioning.
• Causes: 1. Check that you can hear a dial tone by pressing OHD. 2. Check that you can hear a RECEIVE tone when MODEM testing in TECH Mode.
• Remedy: 1. If MODEM testing is normal and there is no dial tone, then try replacing the LIU B'd. 2. If testing the MODEM shows a fault replace the Main B'd.

• Code: 20
• Description: Defective FAX FORWARD RECEIVE is functioning, but FORWARD is not functioning or received data is corrupt.
• Causes: 1. Check if there is a NOISE line by pressing on-hook dial and listening. 2. Check that the destination fax machine can receive forwarded faxes by using a different sending fax machine (preferably from the same wall socket). 3. Check the cable between the set and the wall socket for damage.
• Remedy: 1. If you can hear a noisy line when using on-hook dial, replace or repair the telephone line 2. Replace LIU. 3. Replace the line cord.

• Code: 21
• Description: Defective FAX RECEIVE (1) FORWARD is functioning, but RECEIVE is not functioning or the received data is corrupt.
• Causes: 1. Check if there is a NOISE line by pressing on-hook dial and listening 2. Use a different fax machine to receive from the same sender (if possible on the same wall socket).
• Remedy: 1. If you can hear a noisy line when using on-hook dial, replace or repair the telephone line. 2. Replace the LIU.ages print.

• Code: 22
• Description: Defective FAX RECEIVE (2) Received data are lengthened or cut in the printing.
• Causes: 1. Check if there is a NOISE line by pressing on-hook dial and listening 2. Ask sender to send to another fax machine (if possible connected to the same wall socket)
• Remedy: 1. If you can hear a noisy line when using on-hook dial, replace or repair the telephone line 2. Replace LIU or main PBA in sequence.

• Code: 23
• Description: Defective FAX RECEIVE (3) The phone is ringing continuously, but it set does not answer the call.
• Causes: Check that the RECEIVE Mode is set to FAX MODE.
• Remedy: If the fault persists even when the RECEIVE Mode is changed to FAX MODE then replace the LIU and the Main B'd in sequence.

• Code: 24
• Description: Defective FAX RECEIVE (4) Received data is reduced by more than 50% in the printing.
• Causes: Check the FAX status of the forwarding side.
• Remedy: This is a problem with the sending fax machine. Correct the setting on the remote machine.