Toshiba MMU-AP0072WH1, Installation Manual, Page: 31 / 39

SMMS 2-way Air Discharge Cassette Type Installation Manual
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Check method
On the wired remote controller, central control remote controller and the interface P.C. board of the outdoor unit (I/F), a check display LCD (Remote controller) or 7-segment display (on the outdoor interface P.C. board) to display the operation is
provided. Therefore the operation status can be known. Using this self-diagnosis function, a trouble or position with error of the air conditioner can be found as shown in the table below.
Check code list
The following list shows each check code. Find the check contents from the list according to part to be checked.
• In case of check from indoor remote controller: See “Wired remote controller display” in the list.
• In case of check from outdoor unit: See “Outdoor unit 7-segment display” in the list.
• In case of check from indoor unit with a wireless remote controller: See “Sensor block display of receiving unit” in the list.
: Lighting, : Flashing, : Goes off
IPDU: Intelligent Power Drive Unit
ALT : Flashing is alternately when there are two flashing LED.
SIM : Simultaneous flashing when there are two flashing LED.
Check code Wireless remote controller
Check code name Judging device
Wired remote
controller display
Outdoor unit 7-segment display Sensor block display of receiving unit
Auxiliary code Operation Timer Ready Flash
E01 — —
Communication error between indoor unit and remote controller
(Detected at remote controller side)
Remote controller
E02 — — Remote controller transmission error Remote controller
E03 — —
Communication error between indoor unit and remote controller
(Detected at indoor unit side)
Indoor unit
E04 — —
Communication circuit error between indoor/outdoor unit (Detected at
indoor unit side)
Indoor unit
E06 E06
No. of indoor units in which sensor has been
normally received
Decrease of No. of indoor units I/F
— E07 —
Communication circuit error between indoor/outdoor unit (Detected at
outdoor unit side)
I/F
E08 E08
Duplicated indoor unit addrsses
Duplicated indoor unit addresses
Indoor unit •
I/F
E09 — — Duplicated master remote controllers Remote controller
E10 — — Communication error between indoor unit MCU Indoor unit
E12 E12
01: Indoor/Outdoor units communication
02: Outdoor/Outdoor units communication
Automatic address start error I/F
E15 E15 — No indoor unit during automatic addressing I/F
E16 E16
00: Capacity over
01 ~: No. of connected units
Capacity over / No. of connected indoor units I/F
E18 — — Communication error between header and follower units Indoor unit
E19 E19
00: No header
02: Two or more header units
Outdoor header units quantity error I/F
EN-59 EN-60