12-4
TROUBLESHOOTING
SM TQDCI 1-A.1 GB
12.3.2
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
2 RT-1
is
shorted
3 RT-2
is
disconnected
1 1
4 RT-2
is
shorted
1
… Reserved
1
1
7 Communication
mismatch
1 1 1
8 No
Communication
1
9 No
Encoder
1
1
10
Reserved
0 1 0 1 0
11
Outdoor
Unit
Fault
0 1 0 1 1
… Reserved
17 Defrost
protection
1
1
18 Deicing
Protection
1
1
19 Outdoor
Unit
Protection
1
1 1
20 Indoor
Coil
HP
Protection
1
1
21
Overflow Protection
1
1
1
… Reserved
24
EEPROM Not Updated
1
1
25 Bad
EEPROM
1
1
1
26 Bad
Communication
1
1
1
27 Using
EEPROM
data
1 1
1 1
28 Model
A
1 1 1
29 Model
B
1 1 1
1
30
Model
C
1 1 1 1
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.
CONTENTS
