Electra DCI 80, Service Manual

Page: 83 / 162

13-3
TROUBLESHOOTING
Revision Y05-02
Service Manual - WNG 50_60_80 DCI
13.3
Judgment by Indoor/Outdoor Unit Diagnostics
Enter diagnostics mode - press for five seconds Mode/Reset button in any
operation mode. Acknowledgment is by 3 short beeps and lights of all Display
LED’s. Then, The units will enter into Indoor and Outdoor unit diagnostic
modes.
During the Outdoor unit diagnostics all three Indoor LED’s (STBY/Operate,
Filter and Timer) are blinking. When Indoor diagnostics is displayed, all three
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 Filter
& Timer LEDs.
The coding method will be as follows:
Filter LED will blink 5 times in 5 seconds, and then will be shut off for the next 5
seconds. Timer LED will blink during the same 5 seconds according to the following
Indoor / Outdoor unit tables:
Note: 0 – OFF, 1-ON
13.3.1 Indoor unit Diagnostics
No Problem 5 4 3 2 1
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 0 1 0 1 0
11 Outdoor Unit Fault 0 1 0 1 1
… Reserved
17 Defrost protection
18 Deicing Protection
19 Outdoor Unit Protection
20 Indoor Coil HP Protection
21 Reserved
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