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5 Concentration control setting
Automatic fan speed control according to the CO
concentration or PM2.5 concentration can be selected individually.
2
When both controls are enabled, the unit will run at a fan speed close to the target concentration (higher of the concentrations).
DN code
SET DATA
560
CO
concentration control
2
566
PM2.5 concentration control
* Both CO
concentration control and PM2.5 concentration control are enabled in the factory default settings, so be extra careful when either
2
control is disabled as the following faults may occur.
1) If CO
concentration control is disabled and the PM2.5 concentration is maintained at a low level, the fan speed will drop, so the indoor
2
CO
concentration may rise.
2
2) If PM2.5 concentration control is disabled and the CO
PM2.5 concentration may rise.
* Refer to section 6 for details on the concentration control in a group connection system.
6 Remote controller display and concentration control according to system
configuration
●
Heat recovery ventilation unit only system
(when multiple heat recovery ventilation units are connected in a group)
The CO
/ PM2.5 concentration displayed on the remote controller (RBC-A*SU5*) is the concentration detected by the sensor connected to
2
the header unit.
Automatic fan speed control by sensor is only applicable to heat recovery ventilation units connected to a sensor.
Heat recovery ventilation units not connected to sensors will run at a fixed ventilation fan speed setting when Fan speed [AUTO] is selected.
(Refer to section 8)
●
When system is linked with air conditioners
The CO
/ PM2.5 concentration displayed on the remote controller (RBC-A*SU5*) is the concentration detected by the sensor connected to
2
the heat recovery ventilation unit with the smallest indoor address.
Automatic fan speed control by sensor is only applicable to heat recovery ventilation units connected to a sensor.
Heat recovery ventilation units not connected to sensors will run at a fixed ventilation fan speed setting when Fan speed [AUTO] is selected.
(Refer to section 8)
7 Minimum ventilation fan speed setting
When running under automatic fan speed control, the minimum ventilation fan speed is set as [Low] but this can be changed to [Medium]. (In
this case, the fan speed is controlled at 5 levels)
DN code
SET DATA
Concentration-controlled minimum ventilation
79B
fan speed
8 Fixed fan speed setting with no sensor equipped when there is a sensor failure
In the system configuration in section 6 above, heat recovery ventilation units with no sensor equipped will run at a fixed ventilation fan
speed setting when Fan speed [AUTO] is selected with the remote controller. In addition, for heat recovery ventilation units equipped with a
sensor, the unit will also run at a fixed ventilation fan speed setting when the sensor performing concentration control fails (*1).
This fixed ventilation fan speed setting can be set.
DN code
SET DATA
79A
Fixed ventilation fan speed setting
When this DN code is set to [High], the unit will run in the [High] mode even if the DN code "5D" is set to [Extra High].
If the fan speed needs to be set to [Extra High], see the installation manual of the heat recovery ventilation unit (5. Power setting for applied
control) and set the DN code "750" and "754' to 100%.
*1 If both CO
and PM2.5 concentration control are enabled and either sensor fails, the unit will run at automatic fan speed control with the
2
functioning sensor.
0000
Uncontrolled
Uncontrolled
concentration is maintained at a low level, the fan speed will drop, so the indoor
2
0000
Low
(factory default)
0000
0001
High
Medium
(factory default)
3
9 CO
sensor calibration function settings
2
The CO
sensor uses the lowest CO
2
concentration) to perform automatic calibration. When the unit is used in a location where the atmospheric CO
0001
higher than the general reference value (along main roads etc.), or in an environment where the indoor CO
the detected concentration may deviate greatly from the actual concentration due to the autocalibration effect, so either disable the
Controlled
automatic calibration function, or perform force calibration where necessary.
(factory default)
DN code
Controlled
(factory default)
564
DN code
565
For force calibration, after setting the DN code "564" to 0002, set DN code "565" to a numeric value.
To perform force calibration, a measuring instrument that can measure the CO
ventilation unit at a time period during which the CO
air inlet (RA) with the remote controller using the prescribed method.
Force calibration is performed once only after configuration ends. Not implemented periodically.
10 CO
sensor altitude correction
2
Correction of the CO
2
DN code
563
11 Ventilation fan speed [AUTO] fixed operation setting
For a system that is connected to an air conditioner, Fan speed [AUTO] cannot be selected from the remote controller. By changing the DN
code "796" setting, it is possible to run the heat recovery ventilation unit at Fan speed [AUTO] regardless of the fan speed set by the remote
controller.
In this case, take note that the fan speed will be fixed as [AUTO].
DN code
796
0001
Medium
List of check codes for CO
Refer to the installation manual of the heat recovery ventilation unit for other check codes.
Check code
Indoor unit - sensor board
E30
communication trouble
0002
J04
CO
Low
J05
PM sensor trouble
* "Indoor" in "Judging device" refers to the heat recovery ventilation unit or the air conditioner.
concentration in the past 1 week as a reference value (equivalent to the general atmospheric CO
2
SET DATA
0000
Autocalibration enabled
CO
sensor automatic calibration
Force calibration
2
function
disabled
(factory default)
SET DATA
0000
No calibrate
CO
sensor force calibration
2
(factory default)
concentration is required separately. Run the heat recovery
2
concentration is stable, and quickly set the CO
2
concentration will be performed according to the altitude at which the heat recovery ventilation unit is installed.
SET DATA
0000
No correction (altitude 0 m)
CO
sensor altitude correction
2
(factory default)
SET DATA
Invalid
Ventilation fan speed [AUTO] fi xed
(according to fan speed in remote
operation
controller settings)
(factory default)
• PM2.5 sensor
2
Judging
Typical cause of trouble
device
When communication between the Indoor unit and sensor boards is not
Indoor
possible (operation continues)
sensor trouble
Indoor
When a CO
2
Indoor
When a PM2.5 sensor trouble is detected (operation continues)
4
2
concentration is always
2
concentration is always higher,
2
0001
0002
Autocalibration disabled
Autocalibration disabled
Force calibration
Force calibration enabled
disabled
0001 - 0100
Calibrate with setting data × 20 ppm
concentration
concentration value measured at the
2
0000 - 0040
Setting data × 100 m altitude correction
0000
0001
Valid
(fi xed at Fan speed [AUTO])
Check points and description
sensor trouble is detected (operation continues)
2
EB28069101
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