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cassette type
Operation
Auto airflow
direction
Manual airflow
direction
Normal
Normal
Heating
Vertical vanes
1
2
3
4
35
fixed
20
fixed
35
fixed
cooling,
soft dry and air circulation
are the same
Normal (wind blowing)
Auto
wind
wind
direction
Manual
airflow.
direction
Auto/manual
airflow direction
cooling
air circulation
soft dry
In mode
judgment
Stop
Auto airflow direction
Manual airflow direction
Heating and heat-removing control
(up)
Relay opened
and
compressor
running
continuously
for less than
60 minutes
Relay opened
and
compressor
running
continuously
for 60
minutes
Condensation control
Normal (wind blowing)
Relay opened
and
compressor
running
continuously
for less than
60 minutes
Relay opened
and
compressor
running
continuously
for 60
minutes
Condensation control
Normal
(cold)
Normal
(cold)
Relay opened
and
compressor
running
continuously
for less than
60 minutes
Relay opened
and
compressor
running
continuously
for 60
minutes
Condensation
control
20
~70
20
20
20
35
35
35
50
50
50
70
70
70
20
~70
20
~70
35
35
35
35
20
20
105
CU-MP28DBH5/CU-MP50DBH5
Vane angle
wall-mounted type
Vane angle
cooling/heating auto
airflow direction 1:20
airflow direction 2:35
airflow direction 3:50
airflow direction 4:70
Closed position
Cassette type
Upper limit
airflow direction 1
170
(Vane angle)
When airflow direction is
changed or re-started: 22.06
changed or re-started: 22.06
s
when swinging in cooling
and heating (auto airflow direction): 4.39
s
Closed position
Position limiter 0
Heating airflow direction 5: refer to
heating and heat-removing control
heating and heat-removing control
airflow direction 2
airflow direction 3
airflow direction 4
130
Vane actions
1.
airflow direction
Manual
Press the airflow direction setting button on the remote control, the vane will move to
the designated position. There are 4 speeds, whose specific positions are seen as the
following mode.
the designated position. There are 4 speeds, whose specific positions are seen as the
following mode.
wall-mounted type
EEPROM data
airflow direction angle
airflow direction 1
airflow direction 2
airflow direction 3
airflow direction 4
cooling, air circulation
and soft dry
and soft dry
Heating
7
20
30
41
7
20
45
67
106
CU-MP28DBH5/CU-MP50DBH5
cassette type All the running modes are the same.
EEPROM data
airflow direction angle
airflow direction 1-2
airflow direction 2-3
airflow direction 3-4
airflow direction 4-3
airflow direction 3-2
airflow direction 2-1
Auto
Angle change
Electrification time
To original vane position
70
-20
-70
Swing
4.4
2.6
5.0
4.6
2.6
70
50
50
35
35
20
20
35
35
50
50
70
2. Auto airflow direction
In cooling and air circulation:
Swinging between airflow direction 1 and 4 (the fan will not act when stopped)
When the cassette type is operated by the remote control, the vane angle will be fixed in
airflow direction 2 after the compressor has run for 20 minutes.
Swinging between airflow direction 1 and 4 (the fan will not act when stopped)
When the cassette type is operated by the remote control, the vane angle will be fixed in
airflow direction 2 after the compressor has run for 20 minutes.
In soft dry:
Swinging between airflow direction 1 and 4 (the fan will not act when stopping)
When the cassette type is operated by the remote control, the vane angle will be fixed in
airflow direction 2 after the compressor has run for 20 minutes.
airflow direction 2 after the compressor has run for 20 minutes.
Swinging between airflow direction 1 and 4 (the fan will not act when stopping)
When the cassette type is operated by the remote control, the vane angle will be fixed in
airflow direction 2 after the compressor has run for 20 minutes.
airflow direction 2 after the compressor has run for 20 minutes.
Piping temperature control
In heating
Area A, B and C: the upper and lower vanes are fixed at a designated position.
Area A
Area B
Area C
Tubing Temperature
65
37
60
30
Tubing temperature control
6
5
Free
Area C
107
CU-MP28DBH5/CU-MP50DBH5
The correction impulse value is as the following table:
Space Interval: every 30 seconds
Type
cooling
soft dry
D maximal
D maximal
D minimum
D minimum
1HP
1.5HP
1.75HP
2HP
2.5HP
3HP
40
50
60
60
80
90
40
50
60
60
80
90
40
50
60
60
80
90
40
50
60
60
80
90
3. Vane actions when power supply is switched on
wall-mounted type: the vane original action will return to the shutdown position when
power supply is switched on.
cassette type: the vane will move to the resetting direction, and the position
limitation switch will be open and move to airflow direction 1 when
power supply is switched on (horizontal).
power supply is switched on (horizontal).
Actions in auto running mode judgment
Actions in deicing operation
Wall-mounted type: When the air-conditioner receives the deicing signal and the indoor
temperature is under 25
, the vane position will be heating
5 in auto airflow direction setting.
Cassette type: The same as above, the vane position is airflow direction 1 (horizontal).
Release conditions: 30 seconds after the deicing signal is released or wind
Release conditions: 30 seconds after the deicing signal is released or wind
manual controlled.
tubing
airflow direction
direction is
9.17. Expansion valve control
9.17.1. Expansion valve drive control
Refrigerant distribution when numerous indoor units are connected;
Prevent the outlet temperature too high in overload
Set the preliminary impulse when the compressor is started, so as to guarantee that the
refrigerant can cycle after the compressor is started and prevent abnormal refrigerant
backflow at the same time.
Prevent the outlet temperature too high in overload
Set the preliminary impulse when the compressor is started, so as to guarantee that the
refrigerant can cycle after the compressor is started and prevent abnormal refrigerant
backflow at the same time.
;
9.17.2. Indoor temperature load control (indoor heat exchanger too hot SH)
If the indoor heat exchanger is too hot, indoor temperature control will be carried out.
Indoor heat exchanger too hot SH = tubing temperature - heat exchanger temperature
Indoor heat exchanger too hot SH = tubing temperature - heat exchanger temperature
The correction impulse of the expansion valve is
following table so as to mend initial impulse setting
set as the
airflow direction angle
From stop status
to auto running
cooling,
soft dry and
heating operation to auto
running
Auto angle
cooling wind
direction 1
cooling,
soft dry and
heating operation
Auto airflow direction
Manual angle
cooling setting
airflow direction
Setting position of
cooling,
soft dry and
heating operation
Correction value
Heat exchanger SH
D<18
18
D<21
21
D
Tsh<0
0
Tsh<2
2
Tsh
-2
0
+2
-4
0
+4
-6
0
+6
108
CU-MP28DBH5/CU-MP50DBH5
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