Service manual
13-8
TROUBLESHOOTING
SM CINCO 1-A.1 GB
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
13.4.4 Fault Code for Indoor unit
Note: Indoor unit diagnostics can be viewed by the outdoor unit display board ( 13.4).
The below procedure is for viewing the indoor unit codes via the indoor unit led display.
Pressing Mode button for more than 5 seconds will activate diagnostic mode by the acknowledgment of 3 short beeps and
lighting of COOL and HEAT LED’s.
When Indoor diagnostics is displayed, all four LED’s (STBY, Operate, Filter, TMR) are on.
Entering diagnostics in STBY mode allows only viewing of status (fault-display).
In diagnostic mode, system problems / information will be indicated by blinking of Heat & Cool LED’s.
The coding method will be as follows:
Heat led will blink 5 times in 5 seconds, and then will be shut off for the next 5 seconds. Cool Led will blink during the same
5 seconds according to the following table:
№ Fault Name 5 4 3 2 1
1 RT-1 is disconnected 0 0 0 0 1
2 RT-1 is shorted 0 0 0 1 0
3 RT-2 is disconnected 0 0 0 1 1
4 RT-2 is shorted 0 0 1 0 0
… Reserved 0 0 1 0 1
7 Communication mismatch 0 0 1 1 1
8 No Communication 0 1 0 0 0
9 No Encoder 0 1 0 0 1
10 Reserved 0 1 0 1 0
11 Outdoor Unit Fault 0 1 0 1 1
… Reserved
17 Defrost protection 1 0 0 0 1
18 Deicing Protection 1 0 0 1 0
19 Outdoor Unit Protection 1 0 0 1 1
20 Indoor Coil HP Protection 1 0 1 0 0
21 Overflow Protection 1 0 1 0 1
… Reserved
24 EEPROM Not Updated 1 1 0 0 0
25 Bad EEPROM 1 1 0 0 1
26 Bad Communication 1 1 0 1 0