13-16
TROUBLESHOOTING
SM PNXDCI 1-A.1 GB
13.2.4 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.
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 54321
1 RT-1 is disconnected 00001
2 RT-1 is shorted 00010
3 RT-2 is disconnected 00011
4 RT-2 is shorted 00100
… Reserved 00101
7 Communication mismatch 00111
8 No Communication 01000
9 No Encoder 01001
10 Reserved 01010
11 Outdoor Unit Fault 01011
… Reserved
17 Defrost protection 10001
18 Deicing Protection 10010
19 Outdoor Unit Protection 10011
20 Indoor Coil HP Protection 10100
21 Overflow Protection 10101
… Reserved
24 EEPROM Not Updated 11000
25 Bad EEPROM 11001
26 Bad Communication 11010
27 Using EEPROM data 11011
28 Model A 11100
29 Model B 11101
30 Model C 11110
31 Model D 11111
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.
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