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5│Checking the Operation
After connecting the M-NET transmission line, look through the LED display
hole on the casing side to check the LED7 light (Green: power) turns on.
If the LED7 light (Green) is not turned on, no power is being supplied to the
MN Converter. Check the connection of the transmission line and/or the wiring.
(The power is supplied from the M-NET transmission line.)
6│MN Converter Configuration and Self-Diagnose Function
6.1 Configuration
The MN Connector consists of the upper casing, control board, power
supply circuit board, the lower casing and the transmission line.
For the maintenance and self-diagnose etc., remove the casing screws
(4 screws) to remove the upper casing.
To avoid the risk of electric shock or damage to the
△
！
board, never disassemble the MN Converter with the
Caution
transmission line connected. Be certain to disconnect
the transmission line before starting the operation.
6.2 Names and functions of parts (control board)
Power supply circuit board connecting connector
USB connector
RS-232C D-SUB 9-Pin connector
SW1
Function name
1 to 5
Not used
Set all switches to OFF.
6 to 8
For maintenance
Change the settings to check the status.
Settings to be made are shown below.
6.3 Self-Diagnose function
LED
Functions
number
LED1 to 4
LED for maintenance
(Green)
Displayed contents are changed according to SW1-6 to 8 settings.
SW1
Functions
-6
-7
-8
OFF
OFF
OFF
Operation status
display
OFF
OFF
ON
Communication
status display
OFF
ON
OFF
Error status
display
OFF
ON
ON
Communication
error detail 1
ON
OFF
OFF
Communication
error detail 2
ON
OFF
ON
Remote error
notification error
detail 1
ON
ON
OFF
Remote error
notification error
detail 2
ON
ON
ON
Not used
RS-232C
USB
USB Connector to
RS-232C Connector
personal computer
to personal
computer/modem
Upper casing
Control board
LED1
LED2
LED3
→
ON
LED4
1
SW1
8
(*Factory setting: All are set to OFF.)
LED7
LED6
LED5
Function details
Remarks
-
Factory setting: All are
set to OFF.
Function details
Meaning
LED1
LED2
LED3
Maintenance
Remote error
Constant
Remote error
mode
notification
monitor status
notification status
mode
M-NET
M-NET
RS-232C
RS-232C
transmission
reception
transmission
reception
Air-conditioner
Preliminary
Communication
Remote error
malfunction
error
error
notification error
Duplicated
Bus busy error H/W error
address error
No polar settings
Transmitted
No ACK error
No response
error
data error
error
Unregistered
No connection
No response
Call timeout
phone number to
information
from the modem
be connected.
Call redialing
* Do not set the functions.
LED7 (Green)
(Power
LED
indicator)
number
STATUS/POWER
LED5
Operation status LED
(Yellow)
LED5 (Yellow)
(Status indicator)
Transmission
line
Power supply
circuit board
Lower casing
Casing screw (4 screws)
LED6
USB transmission/
(Green)
reception status LED
LED7
Power LED
(Green)
7│Troubleshooting
Check the operation according to the following contents.
Phenomenon
MN Converter does not run
RS-232C Communication
error
USB Communication error
Operation status LED
(LED5: yellow) is blinking
with pattern 1(Slow blink).
Operation status LED
(LED5: yellow) is blinking
with pattern 2(Long blink).
LED4
8│Specification
Item
Dimensions
Weight
Power Supply (*1)
Rated Power Consumption
Environment Conditions
Interface
*1: Supply electric power from a power supply unit for the transmission line or an outdoor unit.
3
Functions
Function details
【For the both maintenance mode and the remote error notification mode】
Lit: Ready for operation. (normal)
Unlit: Not ready for operation. (error)
【For the remote error notification only.】
Blink: When the remote error notification activates, the LED light blinks
according to the following blink patterns:
Pattern
Explanation
Priority*
1
Slow blink
High
↑
2
Long blink
↑
↑
3
Double blink
Low
4
Blinking
(*When all of the operation statuses occur at a time, the status with the highest priority is displayed.)
Refer to the Operating Manual of the MAINTENANCE TOOL for more information.
LED6 blinks on transmitting and receiving data through USB communication.
LED7 lights when the MN Converter power turns on.
Check items
Check whether the power LED (LED7) is lit.
When the power LED (LED7) is not lighting, no power is
being supplied. Check the wiring.
Check whether the voltage of the M-NET transmission
contact is between DC17-30V.
Check whether the operation status LED
When the operation state LED (LED5) does not light,
(LED5) is lit.
this device does not work properly. Check whether
SW1-1 to 5 are turned OFF.
Check whether the cable is firmly connected.
Connect the cable firmly.
Check the COM Port number of the cable
Change the COM port number to be used on the
connected to the personal computer.
MAINTENANCE TOOL screen.
Check the cable type.
When RS-232C is connected to the personal computer,
use the cross cable. When it is connected to the modem,
use the straight cable.
Check whether the cable is firmly connected.
Firmly connect the cable.
The drivers are not installed.
Install the drivers. (The drivers are contained in the
setup CD attached to the MAINTENANCE TOOL
Ver.4.20 or later.
Communication failure with the modem that is
Check that the power of the modem is turned on and
connected to the MN Converter.
that the communication cable of the modem is correctly
connected.
Remote error notification failed.
Check the "Report log display" screen of the
MAINTENANCE TOOL. Then check the modem that is
connected to the MN Converter, phone line, and the
remote error notification status. (Refer to the Operating
Manual of the MAINTENANCE TOOL for more
information.)
Specification
1
160 (W) × 37 (H) × 137 (D) mm / 6
1
lb
0.65 kg / 1
/
2
30 VDC / 24 VDC (M-NET)
2 W
Operating temperature range
Temperature
Storage temperature range
Humidity
30 to 90%RH (no condensation)
RS-232C (D-SUB 9Pin: male connector)
USB connector (Type B)
···Lit (Unit: second)
Blinking pattern
Operation status
Modem error
0.5
2.0
0.5
Remote error notification
2.0
0.5
2.0
failed
Redialing
0.2-0.1-0.2-0.5
Air-conditioner error
0.5 0.5
Remedy
1
3
(W) × 1
(H) × 5
/
/
/
(D) in
4
2
8
0 to 40°C [32 to 104°F]
-20 to 60°C [-4 to 140°F]
4
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