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Installation Manual
EN-77
EN-78
F31
—
Outdoor program trouble
H01
—
Compressor breakdown
H02
—
Compressor trouble (Lock)
H03
—
Current detective circuit system trouble
H05
—
TD sensor miswiring
H06
—
Low-pressure protective operation
H07
—
Oil level down detection
H08
01
TK sensor trouble for oil level
H16
01
Oil level detector circuit trouble
L04
—
Outdoor system address duplicated
L06
Number of indoor units with priority
Duplication of indoor units with priority
L08
—
Indoor group / Address unset
L10
—
Outdoor capacity unset
L23
02
SW setting trouble when connecting to HWM unit
L29
IPDU quantity information *1
IPDU quantity error
L30
Detected indoor unit address
External interlock of indoor unit
P03
—
Discharge temp TD trouble
P04
—
High-pressure switch trouble
P05
00
Phase missing detection
*E (*: Fan motor number)
Fan motor Vdc trouble
—
Compressor Vdc trouble
P07
—
Heat sink overheat trouble
P10
Detected indoor unit address
Indoor overflow trouble
P13
—
Outdoor liquid back detection trouble
P15
01: TS condition 02: TD condition
Gas leak detection
P19
—
4-way valve operation trouble
P20
—
High-pressure protective operation
P22
*0: Elemental device short
*1: Position detective circuit trouble
*2: Input current sensor trouble
*3: Fan motor lock trouble *4: Motor current trouble
*5: Synchronize, step out trouble
*C: Sensor temperature trouble
*D: Sensor short, free trouble
(*: Fan motor number)
Outdoor fan IPDU trouble
P26
—
Compressor IPM short protection trouble
P29
—
Compressor position detective circuit system trouble
*1 IPDU number information
01: Compressor 02: Fan 1 03: Compressor and Fan 1
04: Fan 2 05: Compressor and Fan 2 06: Fan 1 and Fan 2
07: Compressor, Fan 1 and Fan 2 08: Fan 3 09: Compressor and Fan 3
0A: Fan 1 and Fan 3 0B: Compressor, Fan 1 and Fan 3 0C: Fan 2 and Fan 3
0D: Compressor, Fan 2 and Fan 3 0E: Fan 1, Fan 2 and Fan 3
0F: Compressor, Fan 1, Fan 2 and Fan 3
Check code
Check code name
Indication on 7-segment display on the outdoor unit
Auxiliary code
WARNINGS ON REFRIGERANT LEAKAGE
Check of Concentration Limit
The room in which the air conditioner is to be installed requires a design that in the event of
refrigerant gas leaking out, its concentration will not exceed a set limit.
The refrigerant R410A which is used in the air conditioner is safe, without the toxicity or combustibility of ammonia,
and is not restricted by laws to be imposed which protect the ozone layer. However, since it contains more than air, it
poses the risk of suffocation if its concentration should rise excessively. Suffocation from leakage of R410A is almost
non-existent. With the recent increase in the number of high concentration buildings, however, the installation of multi
air conditioner systems is on the increase because of the need for effective use of floor space, individual control,
energy conservation by curtailing heat and carrying power etc.
Most importantly, the multi air conditioner system is able to replenish a large amount of refrigerant compared with
conventional individual air conditioners. If a single unit of the multi conditioner system is to be installed in a small
room, select a suitable model and installation procedure so that if the refrigerant accidentally leaks out, its
concentration does not reach the limit (and in the event of an emergency, measures can be made before injury can
occur).
In a room where the concentration may exceed the limit, create an opening with adjacent rooms, or install mechanical
ventilation combined with a gas leak detection device.
The concentration is as given below.
The concentration limit of R410A which is used in multi air conditioners is 0.3 kg/m
3
.
NOTE 1
If there are 2 or more refrigerating systems in a single refrigerating device, the amounts of refrigerant should be as
charged in each independent device.
For the amount of charge in this example:
The possible amount of leaked refrigerant gas in rooms A, B and C is 10 kg.
The possible amount of leaked refrigerant gas in rooms D, E and F is 15 kg.
Total amount of refrigerant (kg)
Concentration limit (kg/m
3
)
Min. volume of the indoor unit installed room (m
3
)
e.g., charged amount (10 kg)
Outdoor unit
e.g., charged amount (15 kg)
Indoor unit
Room A
Room B
Room C
Room D
Room E
Room F
2FAN_IM_DB04307201-04_EN.book Page 39 Tuesday, December 17, 2019 6:34 PM
