Electra LEX 25 DCI Service Manual page 86

13.1.3 Judgment by Indoor/Outdoor Unit Diagnostics
Enter diagnostics mode - press for five seconds Mode button in any operation mode. Acknowledgment
is by 3 short beeps and lights of COOL and HEAT LED's. Then, every short pressing of Mode button
will scroll between Indoor and Outdoor unit diagnostic modes by the acknowledgment of 3 short
beeps and lighting of COOL and HEAT LED's.
During the Outdoor unit diagnostics all four Indoor LED's (STBY, Operate, Filter and Timer) are
blinking. When Indoor diagnostics is displayed, all four LED's (STBY, Operate, Filter and Timer) are
ON.
When system enters diagnostics mode, only one fault code is shown. Order of priority is from the
lower to the higher number. Diagnostics is continuously ON as long as power is ON. The current
system operation mode will not be changed.
If no fault occurred in the system, no fault code will be displayed during normal operation mode. The
last fault code will be displayed even if the system has recovered from that fault. The last fault will be
deleted from the EEPROM after the system has exit diagnostics mode.
In diagnostics mode, system fault / status will be indicated by blinking of Heat & Cool LEDs.
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 Indoor / Outdoor unit tables:
Note: 0 – OFF, 1-ON
13.1.4 Indoor Unit Diagnostics
No
1 RT-1 is disconnected
2 RT-1 is shorted
3 RT-2 is disconnected
4 RT-2 is shorted
5 Reserved
7 Communication mismatch
8 No Communication
9 No Encoder
10 Reserved
11 Outdoor Unit Fault
... Reserved
17 Defrost protection
18 Deicing Protection
19 Outdoor Unit Protection
20 Indoor Coil HP Protection
21 Overflow Protection
22 Reserved
24 EEPROM Not Updated
25 Bad EEPROM
26 Bad Communication
27 Using EEPROM data
28 Model A
29 Model B
30 Model C
31 Model D
SM LEXDCI 1-E.1 GB
Problem
CONTENTS
TROUBLESHOOTING
5 4 3 2
0 0 0 0
0 0 0 1
0 0 0 1
0 0 1 0
0 0 1 0
0 0 1 1
0 1 0 0
0 1 0 0
0 1 0 1
0 1 0 1
1 0 0 0
1 0 0 1
1 0 0 1
1 0 1 0
1 0 1 0
1 1 0 0
1 1 0 0
1 1 0 1
1 1 0 1
1 1 1 0
1 1 1 0
1 1 1 1
1 1 1 1
1
1
0
1
0
1
1
0
1
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
13-3