Important - Toshiba Carrier MMD-AP0074BH2UL-1 Manuel D'installation

Check code
Outdoor 7-segment display
Wired remote
control display
Auxiliary code
01: Comp. 1 side
P29 P29 02: Comp. 2 side
03: Comp. 3 side
P31 P31 —
Trouble detected by TCC-LINK central control device
Check code
Outdoor 7-segment display
Wired remote
control display
Auxiliary code
C05 — —
C06 — —
C12 — —
Differs according to trouble contents of unit with occurrence of alarm
P30
— —
TCC-LINK : TOSHIBA Carrier Communication Link.
41-EN
Wireless remote control
Sensor block display of
Check code name
receiving unit
Operation Timer Ready Flash
Comp position detective circuit system
ALT
trouble
ALT Other indoor unit trouble
(Group follower unit trouble)
Wireless remote control
Sensor block display of
Check code name
receiving unit
Operation Timer Ready Flash
Sending trouble in TCC-LINK central
—
control device
Receiving trouble in TCC-LINK central
—
control device
Batch alarm of general-purpose
—
equipment control interface
equipment I/F
Group control branching unit trouble
(L20 is displayed) Duplicated central control addresses
– 21 –
Judging
device
Check of Concentration Limit
IPDU
The room in which the air conditioner is to be installed
requires a design that in the event of refrigerant gas
Indoor
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
Judging
buildings, however, the installation of multi air conditioner
device
systems is on the increase because of the need for effective
use of floor space, individual control, energy conservation by
TCC-LINK
curtailing heat and carrying power etc.
Most importantly, the multi air conditioner system is able to
TCC-LINK
replenish a large amount of refrigerant compared with
General- conventional individual air conditioners. If a single unit of the
purpose
multi conditioner system is to be installed in a small room,
select a suitable model and installation procedure so that if
TCC-LINK
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.
Total amount of refrigerant (lbs (kg))
Min. volume of the indoor unit installed room (ft
≤ Concentration limit (lbs/ft
The concentration limit of R410A which is used in multi air
3
conditioners is 0.019 lbs/ft
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.
e.g.,
charged amount
(22 lbs (10 kg))
Room A Room B Room C Room D Room E Room F
For the amount of charge in this example:
The possible amount of leaked refrigerant gas in rooms A,
B and C is 22 lbs (10 kg).
The possible amount of leaked refrigerant gas in rooms
D, E and F is 33 lbs (15 kg).
sandium.com
Warnings on refrigerant leakage
NOTE 2 :
The standards for minimum room volume are as
follows.
(1) No partition (shaded portion)
(2) When there is an effective opening with the adjacent
room for ventilation of leaking refrigerant gas (opening
without a door, or an opening 0.15 % or larger than the
respective floor spaces at the top or bottom of the door).
(3) If an indoor unit is installed in each partitioned room and
the refrigerant piping is interconnected, the smallest
room of course becomes the object. But when a
mechanical ventilation is installed interlocked with a gas
leakage detector in the smallest room where the density
limit is exceeded, the volume of the next smallest room
3 3
(m ))
becomes the object.
3 3
(kg/m ))
3
(0.3 kg/m ).
Very
small
room
Small
room
Mechanical ventilation device - Gas leak detector
Outdoor unit
NOTE 3 :
e.g.,
The minimum indoor floor area compared with the amount of
charged amount
(33 lbs (15 kg)) refrigerant is roughly as follows:
(When the ceiling is 8.9 ft (2.7 m) high)
Range below the
48
density limit of
2
0.019 lbs/ft
d 42
(countermeasures not
36 needed)
30
Indoor unit
24
18
12
6
0

Important

Outdoor unit
Refrigerant piping
Indoor unit
Refrigerant piping
Outdoor unit
Indoor unit
Medium
Large room
room
3 3
(0.3 kg/m )
Range above the density
limit of
3 3
0.019 lbs/ft (0.3 kg/m )
(countermeasures needed)
22 44 66
Total amount of refrigerant lbs
42-EN