Toshiba MMU-AP0072WH Service Manual Download Page 66

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(

∗

)

: Goes on,

: Flashes,

: Goes off

A (Alternate)

: Flashing condition is alternate when there are two flashing LED.

S (Simultaneously) : Two LED flash simultaneously when there are two flashing LED.

Check code display

TCC-LINK central &

remote controllers

H05

H15

H25
H06
H07

H08

H16

L04

L05

L06

L08
L10
L17
L18
L26
L27
L28

L29

(L30)

P03

P05

Sensor lamp display

Block display

Operation Timer Ready Flash

Outdoor 7-segment

Auxiliary code

H05

—

H15

—

H25

—

H06

—

H07

—

01: TK1 sensor error

02: TK2 sensor error

H08

03: TK3 sensor error

04: TK4 sensor error

05: TK5 sensor error
01: TK1 Oil circuit system error

02: TK2 Oil circuit system error

H16

03: TK3 Oil circuit system error

04: TK4 Oil circuit system error

05: TK5 Oil circuit system error

L04

—

L06

No. of preceded indoor units

([L05/L06] by individual display)

L08

—

L10

—

L17

—

L18

—

L26

No. of connected heat units

L27

No. of connected heat units

L28

—

L29

L30

Detection of indoor unit number

P03

—

00: Open phase shortage detection

P05

01: Compressor 1 side

02: Compressor 2 side

03: Compressor 3 side

Main defective position

Outdoor discharge temp. sensor (TD1)

miswiring
Outdoor discharge temp. sensor (TD2)

miswiring
Outdoor discharge temp. sensor (TD3)

miswiring
Low pressure protective operation
Protection for oil level drop

Oil level detection temp. sensor

(TK1 to 5) error

Detection circuit error

Duplicated outdoor system address

Duplicated priority indoor units

(Displayed in priority indoor unit)
Duplicated priority indoor units

(Displayed except priority indoor unit)
Unset indoor group address

Unset outdoor unit capacity
Disagreed error of outdoor model
Refrigerant change unit system error
No. of connected heat unit over
No. of connected heat unit error

No. of connected outdoor units over

IPDU quantity error

Outside error input in indoor (Interlock)

Outdoor unit discharge (TD1) temp. error
Open phase shortage: Power failure error

Inverter DC voltage (Vdc) error

Description

Miswiring or mismounting of outdoor discharge temp. sensor (TD1) or coming-out

of TD1 sensor was detected.
Miswiring or mismounting of outdoor discharge temp. sensor (TD2) or coming-out

of TD2 sensor was detected.
Miswiring or mismounting of outdoor discharge temp. sensor (TD3) or coming-out

of TD3 sensor was detected.
Protection by low pressure (Ps) sensor was detected.
Protection detection by temp. sensor (TK1 to 5) for oil level detection.

Open/Short of temp. sensor (TK1 to 5) for oil level detection was detected.

After starting compressor operation, temperature change of temp. sensor

(TK1 to 5) for oil level detection was not detected.

Duplicated setting of system address to outdoor units of different refrigerant

piping system
Duplicated priority indoor units (For priority indoor unit)

Duplicated priority indoor units (For indoor units without priority)

There is indoor unit which indoor group address was not set

(Detected also at indoor unit side)
Capacity of outdoor unit is not set. (Exchange service P.C. board.)
Former model of outdoor unit (Before 3 series) was connected.
COOL/HEAT cycle error by mispiping, etc was detected.
There are 3 or more connected heat units.
Heat unit was not connected, or combination of No. of outdoor units with No. of

heat units defective.
No. of connected outdoor units exceeded 4 units

No. of IPDU (P.C. board) in inverter box is few.

There is indoor unit which abnormally stops by outer error input in 1 system.

(

←

Indoor unit detected.)

High temp. error was detected at outdoor discharge temp. sensor (TD1).
When power supply was turned on, open phase shortage was detected.

Over current/Current shortage was detected at inverter DC voltage.

A3-IPDU

FAN

A3-IPDU

FAN