12-7
TROUBLESHOOTING
SM YAZDCI 1-A.1 GB
12.3.4
Fault Code for Indoor unit
Pressing Mode button for long 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:
No
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
27
Using EEPROM data
1
1
0
1
1
28
Model A
1
1
1
0
0
29
Model B
1
1
1
0
1
30
Model C
1
1
1
1
0
31
Model D
1
1
1
1
1
1 - ON, 0 - OFF
Only one code is shown. Order of priority is lower to the higher number. Diagnostics is continuously
ON as long power is on.
