Carrier TOSHIBA MMK-UP0301HP-UL Service Manual page 137

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.
Check code
Wired
Outdoor unit 7-segment display
remote
controller
Auxiliary code
display
E01 ─
E02 ─
E03 ─
E04 ─
No. of indoor units in which
E06 E06 sensor has been normally
received
─ E07
Duplicated indoor unit
E08 E08
addresses
E09 ─
E10 ─
E11 ─
01: Indoor/Outdoor units
communication
E12 E12
02: Outdoor/Outdoor units
communication
E15 E15
00: Capacity over
E16 E16
01: No. of connected units
E17 ─
E18 ─
Wireless remote controller
Sensor block display of
receiving unit
Operation Timer Ready Flash
─
─
─
─
─
─
─
─
─
─
─
ALT: Flashing is alternately when there are two flashing LED.
SIM: Simultaneous flashing when there are two flashing LED.
Inverter: Compressor / Fan inverter P.C. Board
Check code name
Communication trouble between indoor unit
and remote controller
(Detected at remote controller side)
Remote controller transmission trouble
Communication trouble between indoor unit
and remote controller
(Detected at indoor unit side)
Communication circuit trouble between
indoor / outdoor unit
(Detected at indoor unit side)
Decrease of No. of indoor units
Communication circuit trouble between
indoor / outdoor unit
(Detected at outdoor unit side)
Duplicated indoor unit addresses
Duplicated master remote controllers
Communication trouble between indoor unit
MCU
Communication trouble between
Application control kit and indoor unit
Automatic address start trouble
No indoor unit during automatic
addressing
Capacity over / No. of connected indoor
units
Communication trouble between indoor unit
and Flow Selector unit
Communication trouble between header and
follower units Indoor unit
- 137 -
: Lighting, : Flashing,
I/F: Interface P.C. Board
Indoor unit •
: Goes off
Judging
device
Remote
controller
Remote
controller
Indoor unit
Indoor unit
I/F
I/F
I/F
Remote
controller
Indoor unit
Indoor unit
Application
control kit
I/F
I/F
I/F
Indoor unit
Indoor unit