12-6
TROUBLESHOOTING
SM YAZDCI 1-A.1 GB
12.3.3 DMSMP
diagnostics
The DMSMP system has 4 IDU LEDs, 1 ODU LED, and 1 Power LED.
Each communication channel is built up from receiving and transmitting channels.
The outdoor controller is the master of communication (always initiated communication) while the
DMSMP and indoor are slave (responds only when it receives).
R
4,
T
4
IDU
4
ODU:
T
O,
R
O
IDU Channel
Selector
MCU
R
4
status
R
3
status
R
1
status
R
2
status
R
3,
T
3
IDU
3
R
2,
T
2
IDU
2
R
1,
T
1
IDU
1
R
O
status
DMSMP
LED
4
LED
3
LED
O
LED
1
LED
2
T
4
,
R
4
IDU
4
T
3
,
R
3
IDU
3
T
2
,
R
2
IDU
2
T
1
,
R
1
IDU
1
ODU:
R
O,
T
O
Master
Slave
Slave
Slave
Channel
LED
R
i
has communication
The relevant LED
i
will be ON.
R
i
has no communication
The relevant LED
i
will be Off.
Damage
Outdoor
Indoors
no
com?
LED1
LED2
LED3
LED4
LEDO
How to check?
T
o
(ODU)
No Com
All no com
Off
Off
Off
Off
Off
Voltage To(ODU) no change
R
o
(DMSMP)
No Com
All no com
Off
Off
Off
Off
Off
Voltage To(ODU) changes
Voltage Ro(DMSMP) no change
T
o
(DMSMP)
No com
All ok
On
On
On
On
On
Voltage Ro(DMSMP) changes
Voltage To(DMSMP) no change
Ro(ODU)
No com
All ok
On
On
On
On
On
Voltage To(DMSMP) changes.
Voltage To(ODU) no changes.
T
4
(DMSMP)
Ok
Indoor 4
On
On
On
Off
On
Exchange with other IDU to know
the problem is in the IDU or the
DMSMP.
R
4
(IDU)
Ok
Indoor 4
On
On
On
Off
On
T4(IDU)
Ok
All ok
On
On
On
Off
On
R4(DMMSP)
Ok
All ok
On
On
On
Off
On
