Delta PG-35 Service Manual Page 62

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  • TROUBLESHOOTING
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12-3
TROUBLESHOOTING
SM DELTA 1-E.2 GB
12.3 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
12.3.1 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

CONTENT
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