8-2. Troubleshooting
Method
The remote controllers (main remote controller and central control remote controller) and the interface P.C. board
of an outdoor unit are provided with an LCD display (remote controller) or a 7-segment display (outdoor interface
P.C. board) to display operational status. Using this self-diagnosis feature, the
problem
site/
problem
part may be
identified in the event of a
problem
by following the method described below.
The list below summarizes check codes detected by various devices. Analyze the check code according to where it is displayed and work out
the nature of the
problem
in consultation with the list.
• When investigating a
problem
on the basis of a display provided on the indoor remote controller or TCC-LINK central control remote controller -
See the “TCC-LINK remote control or main remote controller display” section of the list.
• When investigating a
problem
on the basis of a display provided on an outdoor unit - See the “Outdoor 7-segment display” section of the list.
• When investigating a
problem
on the basis of a wireless remote controller-controlled indoor unit - See the “Light sensor indicator light block”
section of the list.
List of Check Codes (Indoor Unit)
(
Check code
detected by indoor unit)
Check code
Display of receiving unit
Typical
problem
site
Description of
Check code
Outdoor 7-segment display
Indicator light block
Sub-code
Flash
E03
Indoor-remote controller periodic
communication error
Communication from remote controller or network
adaptor has been lost (so has central control
communication).
E04
–
–
–
–
Indoor-outdoor periodic
communication error
Signals are not being received from outdoor unit.
E08
E08
.
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p
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D
E10
Indoor inter-MCU communication
error
MCU communication between main controller and
motor microcontroller is faulty.
E18
Error in periodic communication
between indoor header and
follower unit
Periodic communication between indoor header
and follower units cannot be maintained.
T
L
A
–
–
1
0
F
Indoor heat exchanger
temperature sensor (TCJ) error
Heat exchanger temperature sensor (TCJ) has
been open/short-circuited.
T
L
A
–
–
2
0
F
Indoor heat exchanger
temperature sensor (TC2) error
Heat exchanger temperature sensor (TC2) has
been open/short-circuited.
T
L
A
–
–
3
0
F
Indoor heat exchanger
temperature sensor (TC1) error
Heat exchanger temperature sensor (TC1) has
been open/short-circuited.
T
L
A
–
–
0
1
F
Room air
temperature sensor
(TA
/TSA
) error
Room air
temperature sensor (TA) has been
open/short-circuited.
T
L
A
–
–
1
1
F
Discharge
air
temperature
sensor (TF
/TFA
) error
Discharge
air
temperature sensor (TF) has been
open/short-circuited.
M
I
S
–
–
9
2
F
P.C. board or other indoor error
Open/Short of indoor air suction temperature
sensor (TRA) was detected.
M
I
S
–
–
3
0
L
Duplicated indoor group header
unit
There is more than one header unit in group.
M
I
S
–
–
7
0
L
Connection of group control cable
to stand-alone indoor unit
There is at least one stand-alone indoor unit to
which group control cable is connected.
M
I
S
–
8
0
L
8
0
L
Indoor group address not set
Address setting has not been performed for one or
more indoor units (also detected at outdoor unit
end).
M
I
S
–
–
9
0
L
Indoor capacity not set
Capacity setting has not been performed for indoor
unit.
M
I
S
–
–
0
2
L
Duplicated central control address
There is duplication in central control address
setting.
L30
Detected indoor unit No.
SIM
Indoor external error input
(interlock)
Unit shutdown has been caused by external error
input (CN80).
T
L
A
–
–
1
0
P
Indoor AC fan error
Indoor AC fan error is detected (activation of fan
motor thermal relay).
P10
–
–
–
–
L30
P10 Detected indoor unit No.
ALT Indoor overflow error
Float switch has been activated.
T
L
A
–
–
2
1
P
Indoor DC fan error
Indoor DC fan error (e.g. overcurrent or lock-up) is
detected.
T
L
A
–
–
1
3
P
Other indoor unit error
Follower unit cannot be operated due to header unit
alarm (E03/L03/L07/L08).
IPDU: Intelligent Power Drive Unit (Inverter P.C. board)
:
Lighting, :
Flashing, :
Goes
off
ALT.: Flashing is alternately when there are two flashing LED
SIM: Simultaneous flashing when there are two flashing LED
Operation Timer Ready
TCC-LINK central
control or main
remote controller
display
ALT
Outside air suction temperature
sensor (TOA) error
Open/Short of outside air suction temperature
sensor (TOA) was detected.
ALT
Indoor air suction temperature
sen sor (TRA
)
error
Discharge
air
temperature sensor (TF) has been
open/short-circuited.
–
–
F1
7
–
–
F1
8
−
1
59
−
AMP Air Conditioning
www.ampair.co.uk | [email protected]
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