Toshiba MCY-MHP0404HS-E Service Manual page 101

List of Check Codes (Outdoor Unit)
(Check codes detected by outdoor interface - typical examples)
Check code
Outdoor 7-segment display
Sub-code
Number of indoor units from which
E06
signal is received normally
E07 –
E08 Duplicated indoor address
E12 –
E15 –
00: Overloading
E16
01 or more: Number of units connected.
01: Connection of outdoor unit from
other refrigerant line
E20
02: Connection of indoor unit from
other refrigerant line
Fan IPDU
A3-IPDU
1 (Upper) 2 (Lower)
O
01
O
02
O O
03
E 3 1
04
O
05
O
06
O O
07
Circle (O): Troubled IPDU
F 0 4 –
F 0 6 –
F 0 7 –
F 0 8 –
F 1 2 –
F 1 5 –
F 1 6 –
F 2 3 –
F 2 4 –
AMP Air Conditioning
Display of receiving unit
TCC-LINK Indicator light block
central control
or main remote
Operation Timer
controller
display
E 0 6
(E04)
(E08)
E12
E15
E16
E20
E 3 1
O
O
O
O
F 0 4
F 0 6
F 0 7
F 0 8
F 1 2
F 1 5
F 1 6
F 2 3
F 2 4
IPDU: Intelligent Power Drive Unit (Inverter P.C. board)
: Lighting,
ALT: Flashing is alternately when there are two flashing LED
SIM: Simultaneous flashing when there are two flashing LED
Typical trouble site
Ready
Flash
D o r p p n i g o t u f o n i d o r o
Indoor-outdoor
communication circuit
trouble
Duplicated indoor address
Automatic address starting
trouble
Indoor unit not found
during automatic address
setting
Too many indoor units
connected / overloading
Connection to other
refrigerant line found
during automatic address
setting
IPDU communication trouble
Outdoor discharge
A L T temperature sensor (TD)
trouble
Outdoor heat exchanger
A L T temperature sensor (TE)
trouble
Outdoor liquid temperature
A L T
sensor (TL) trouble
Outdoor outside air
A L T temperature sensor (TO)
trouble
Outdoor suction
A L T temperature sensor (TS)
trouble
Outdoor temperature
A L T sensor (TE, TL) wiring
trouble
Outdoor pressure sensor
A L T
(PD, PS) wiring trouble
Low pressure sensor (PS)
A L T
trouble
High pressure sensor (PD)
A L T
trouble
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: Flashing, : Goes off
Description of check code
Indoor unit initially communicating normally fails to
u n t i return signal (reduction in number of indoor units
connected).
Signal cannot be transmitted to indoor units
( indoor units left without communication from
outdoor unit).
More than one indoor unit is assigned same
address (also detected at indoor unit end).
Indoor automatic address setting is started while
automatic address setting for equipment in other
refrigerant line is in progress.
Indoor unit fails to communicate while automatic
address setting for indoor units is in progress.
Combined capacity of indoor units is too large
(more than 130 % of combined capacity of outdoor
units).
Indoor unit from other refrigerant line is detected
while indoor automatic address setting is in
progress.
There is no communication between IPDUs (P.C.
boards) in inverter box.
Outdoor discharge temperature sensor (TD) has
been open / short-circuited.
Outdoor heat exchanger temperature sensors (TE)
have been open / short-circuited.
Outdoor liquid temperature sensor (TL) has been
open / short-circuited.
Outdoor outside air temperature sensor (TO) has
been open / short-circuited.
Outdoor suction temperature sensor (TS) has
been open / short-circuited.
Wiring trouble in outdoor temperature sensors
(TE,
TL) has been detected.
Wiring trouble in outdoor pressure sensors
(PD, PS) has been detected.
Output voltage of low pressure sensor (PS) is zero.
Output voltage of high pressure sensor (PD) is zero
or provides abnormal readings when compressors
have been turned off.