How To Check; Error Code List - Toshiba MMD-VNK502HEXE Installation Manual

Air to Air Heat Exchanger with DX Coil Unit

How to check

To display an error code or to confirm the operation status, the remote controller (wired remote controller and
central remote controller) is equipped with an LCD display, and the interface circuit board of the outdoor unit is
equipped with a 7 segment display. A self-diagnosis function is activated to find out the details of a problem with
the unit.

Error code list

The table below shows the error codes. See the table for details of error codes.
• To confirm the code from the remote controller, see "Wired remote controller display" in the table.
• To confirm the code from the outdoor unit, see "7 segment display on the outdoor unit" in the table.
• To confirm the code from the AI-NET central remote controller, see "AI-NET central controller display" in the
table.
Error code
Wired
7 segment display on the
remote
outdoor unit
controller
display
Auxiliary code
E01 — —
E02 — —
E03 — —
E04 — —
The number of the indoor
E06 E06
units received normally
— E07 —
E08 E08 Duplicate indoor addresses
E09 — —
E10 — —
01: Communication
between indoor unit
and outdoor unit
E12 E12
02: Communication
between outdoor
units
E15 E15 —
00: Capacity over
01~:
E16 E16
The number of
connected units
E18 — —
00: No center unit
E19 E19 02: 2 or more center
units
00: Connecting outdoor
unit to another
system
E20 E20
01: Connecting indoor
unit to another
system
00: No header unit
01: Duplicated header
E21 E21
units
55-EN
Installation Manual
AI-NET
Error code name
central
controller
display
Communication error between remote controller and
—
indoor unit (Detected by remote controller)
— Remote controller signal transmission error
Communication error between remote controller and
97
indoor unit (Detected by indoor unit)
Indoor/outdoor unit communication circuit error (Detected
04
by indoor unit)
04 Decrease of the number of indoor units
Indoor/outdoor unit communication circuit error (Detected
—
by outdoor unit)
96 Indoor addresses are duplicated.
99 Header unit controllers are duplicated.
CF Communication error between indoor MCUs
42 Automatic addressing start error
42 No indoor units during automatic addressing
89 Exceeding capacity (over 105%) or the number of units
Communication error between header indoor unit and
97·99
follower indoor unit
96 Error with the number of center outdoor units
42 Connected to another system during automatic addressing
42 Error with the number of header thermal storage units
Air to Air Heat Exchanger with DX Coil Unit
Wired
7 segment display on the
remote
outdoor unit
controller
display
Auxiliary code
E22 E22
E23 E23
E25 E25
The number of the outdoor
E26 E26
units received normally
Detected number of outdoor
E28 E28
unit
01: Problem with A3-
IPDU1
02: Problem with A3-
IPDU2
03: Problem with A3-
Judging
IPDU1 and A3-
device
IPDU2
04: Problem with the
fan IPDU
E31 E31
Remote
05: Problem with A3-
controller
IPDU and the fan
IPDU
Remote
controller 06: Problem with A3-
IPDU2 and the fan
Indoor IPDU
07: Problem with all
IPDUs
Indoor
F01 —
I/F
F02 —
F03 —
I/F
F04 F04
Indoor
F05 F05
I/F
F06 F06
Remote
controller
F07 F07
Indoor
F08 F08
F10 F10
F11 F11
I/F
F12 F12
01: Compressor 1 side
F13 F13
02: Compressor 2 side
I/F
F15 F15
F16 F16
I/F
F17 —
F18 —
F23 F23
Indoor
F24 F24
F29 —
I/F
F31 F31
01: Compressor 1 side
H01 H01
02: Compressor 2 side
I/F
01: Compressor 1 side
H02 H02
02: Compressor 2 side
01: Compressor 1 side
H03 H03
02: Compressor 2 side
I/F
H04 H04
– 28 –
Error code
AI-NET
Error code name
central
controller
display
— 42 Decrease of the number of thermal storage units
Communication error between indoor and outdoor unit or
— 15 problem with the number of thermal storage units (problem
with receiving)
— 15 Addresses of terminal outdoor units are duplicated.
15 Decrease of the number of outdoor units
d2 Follower outdoor unit error
CF IPDU communication error
— 0F Indoor TCJ sensor error
— 0d Indoor TC2 sensor error
— 93 Indoor TC1 sensor error
— 19 TD1 sensor error
— A1 TD2 sensor error
— 18 TE1 sensor error
— 18 TL sensor error
— 1b TO sensor error
— 0C Indoor TSA sensor error
— — Indoor TF sensor error
— A2 TS1 sensor error
43 TH sensor error
— Miswiring of outdoor temperature sensor (TE and TL)
— — Miswiring of outdoor pressure sensor (Pd and Ps)
— — Indoor TOA sensor error
— — Indoor TRA sensor error
— 43 Ps sensor error
— 12 Pd sensor error
— 1C Other indoor unit errors
— 1c Outdoor unit EEPROM error
Compressor breakdown
1d Compressor error (Locked)
17 Current detection circuit error
— 44 Compressor 1 case thermostat operation
Installation Manual
Judging
device
I/F
I/F
I/F
I/F
I/F
I/F
Indoor
Indoor
Indoor
I/F
I/F
I/F
I/F
I/F
Indoor
I/F
IPDU
I/F
I/F
Indoor
Indoor
I/F
I/F
Indoor
I/F
IPDU
IPDU
IPDU
EN
I/F
56-EN