How To Check - Toshiba MMK-AP0074MH-E Service Manual

8-2. HOW TO CHECK

On the remote controller (Remote controller, Central control remote controller) and on the interface P.C. board of the outdoor unit, LCD display part (Remote controller) or 7-
segment display part (on outdoor interface P.C. board) is provided in order to display the operation status.
When a trouble occurred, the method to judge the trouble or defective position of the air conditioner by this self-diagnosis function is shown below.
The following table shows the list of each check code that each device detects. Check the check contents in the following table according to position to be checked.
• Check from the indoor remote controller or TCC-LINK central controller: Refer to "Display on remote controller & TCC-LINK central controller" in the following table.
• Check from outdoor unit: Refer to "Display of outdoor segment" in the following table.
• Check from indoor unit of wireless remote controller: Refer to Sensor lamp display" in the following table.
Check code display list (Indoor unit)
[Indoor unit detects error.]
Check code display
Outdoor 7-segment
TCC-LINK central
& remote controller
Auxiliary code
E03 — —
E04 — —
E08 E08 Duplicated indoor unit No.
E10 — —
E18 — —
F01 — —
F02 — —
F03 — —
F10 — —
F11 — —
F29 — —
L03 — —
L07 — —
L08 L08 —
L09 — —
L20 — —
L30 L30 Detected indoor unit No.
P01 — —
P10 P10 Detected indoor unit No.
P12 — —
P31 — —
Note) The check code display may be different according to the detected device even same error contents such as communication error.
Sensor lamp display
Block display (∗) Main defective position
Operation Timer Ready Flash
Regular communication error between indoor
l l
¥
and remote controller
Regular communication error between indoor
l l
¥
and outdoor
l l
¥
Duplicated indoor address
l l
¥
Communication error between indoor MCU
Regular communication error between header
l l
¥
and follower in indoor unit
l
¥ ¥
A Indoor heat exchanger temp. sensor (TCJ) error
l
¥ ¥
A Indoor heat exchanger temp. sensor (TC2) error
l
¥ ¥
A Indoor heat exchanger temp. sensor (TC1) error
l
¥ ¥ A Room tem. Sensor (TA) error
l
¥ ¥
A Discharge air temp. sensor (TF) error.
¥ ¥ l
S Indoor or other P .C. board error
l
¥ ¥
S Duplicated setting of header in indoor group
¥ l ¥
S There is group cable in individual indoor unit.
l
¥ ¥
S Indoor group address is unset.
l
¥ ¥
S Indoor capacity is unset.
¥ ¡ ¥
S Duplicated central control system address
¥ ¡ ¥
S External error was input in indoor (Interlock).
l
¥ ¥
A Indoor AC fan error
l
¥ ¥
A Indoor overflow was detected.
l
¥ ¥ A Indoor DC fan error
l
¥ ¥
A Other indoor unit error
(∗) ¡: Goes on, ¥: Flashes, l: 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.
No communication from remote controller and network adapter
(No central control system communication also)
No communication from outdoor unit
An address same to self address was detected.
Communication error between MCU of main motor microprocessors
Regular communication between header and follower units in indoor unit was impossible.
Open/short of heat exchanger temp. sensor (TCJ) was detected.
Open/short of heat exchanger temp. sensor (TC2) was detected.
Open/short of heat exchanger temp. sensor (TC1) was detected.
Open/short of room temp. sensor (TA) was detected.
Open/short of discharge air temp. sensor was detected.
Indoor EEPROM error (Other error may be detected.)
There were multiple header units in a group.
There is even an indoor unit connected to group in individual indoor unit.
Indoor group address is unset. (Detected also at outdoor unit side)
Capacity of indoor unit is unset.
Setting of central control system address is duplicated.
System abnormally stopped by input of external error (CN80).
Error of indoor AC can was detected. (Fan motor thermal relay operation)
Float switch operated.
Error (Over-current, lock, etc.) of indoor DC fan was detected.
Group follower unit cannot be operated by [E03/L03/L07/L08] alarm of header unit.
Description