Segment Display Function | Toshiba MMU-AP0121MH, MMU-AP0181MH

7-6. 7-Segment Display Function

n7-segment display on the outdoor unit (Interface P.C. board)

On the interface control P.C. board, 7-segment LED to check the operating status is provided on the control P.C. board.

The displayed contents are changed by combining the setup numbers of the rotary switches (SW01, SW02, and SW03) on P.C. board.

7-segment				7-segment
display A				display B

2nd. 1st. 3rd. 2nd. 1st.

place place place place place

Interface P.C. board

SW06			SW07		SW08	SW09
CN30	CN31				SW05		SW15
		CN32		SW04
D600	D601		D602		D603	D604
Display A
SW01		SW02		SW03			Display B

SW06			SW07		SW08	SW09
CN30	CN31				SW05		SW15
		CN32		SW04
D600	D601		D602		D603	D604
Display A
SW01		SW02		SW03			Display B

uCheck procedure in case of stop with trouble

When the system stopped due to a trouble of the outdoor unit, execute a check in the following procedure.

1. Open the panel of the outdoor unit, and then check the 7-segment display.

The check code is displayed at the right side of 7-segment display B.

[U1] [¡¡¡] ([¡¡¡]: Check code)

∗Switch setup when confirming the check code: SW01 [1], SW02 [1], SW03 [1]

However the check code [¡¡¡] is displayed for 3 seconds and the auxiliary code [¡¡¡] for 1 second are alternately displayed if an auxiliary code is provided.

2.Confirm the check code, and then conduct the check operation based on the procedure of each check code diagnosis.

3.[U1] [E28] on 7-segment display means a trouble on the follower unit.

Push the push-switch SW04 on the header unit for several seconds. (2 seconds or more)

As only the fan of the outdoor unit with a trouble drives, open the panel of the corresponding unit, and then confirm the check code displayed with 7-segment.

4.Perform the check operation based on the procedure of each check code diagnosis.

How to read the check monitor

<7-segment display>

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MMU-AP0181MH, MMU-AP0071MH, MMU-AP0091MH, MMU-AP0151MH, MMU-AP0121MH specifications

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Toshiba MMU-AP0121MH Segment Display Function, Check procedure in case of stop with trouble

Models: MMU-AP0181MH MMU-AP0071MH MMU-AP0091MH MMU-AP0151MH MMU-AP0121MH