Daikin AT12BV1LS User manual

Service Diagnosis
SPLIT & MULTI
Si10-417
Pocket
Manual
Cover.fm Page 1 Wednesday, September 22, 2004 6:36 PM

Si10-417
Contents 1
1. Diagnosis by LED ........................2
1.1 Indoor Unit ..................................... 2
1.2 Outdoor Unit .................................. 4
2. Diagnosis by Remote Controller ..6
2.1 To know the error code.................. 6
3. List of applicable models ...........11
3.1 Indoor Units ................................. 11
3.2 Outdoor Units .............................. 17
4. Error Codes and Description of
Fault...........................................21
4.1 Indoor Unit ................................... 21
4.2 Outdoor Unit ................................ 22
4.3 System......................................... 23
5. Troubleshooting ......................... 24
5.1 Indoor Unit ................................... 24
5.2 Outdoor Unit ................................ 35
5.3 System....................................... 124
5.4 Check ........................................ 149
Si10-417TOC.fm Page 1 Wednesday, September 22, 2004 6:37 PM

Diagnosis by LED Si10-417
2 Service Diagnosis
1. Diagnosis by LED
1.1 Indoor Unit
The operation lamp flashes when any of the following
errors is detected.
1. When a protection device of the indoor or outdoor unit
is activated or when the thermistor malfunctions,
disabling equipment operation.
2. When a signal transmission error occurs between the
indoor and outdoor units.
In either case, conduct the diagnostic procedure
described in the following pages.
Wall Mounted Type
ON
OFF
Indicator lamps
Operation lamp (green)
Operation lamp (green)
Indicator lamps
Si10-417.fm Page 2 Wednesday, September 22, 2004 6:38 PM

Si10-417 Diagnosis by LED
Service Diagnosis 3
Floor Ceiling Suspended Dual Type
Floor Standing Type
Duct Connected Type
OPERATION lamp (green)
ON
OFF
OPERATION lamp (green)
OPERATION lamp (green)
Si10-417.fm Page 3 Wednesday, September 22, 2004 6:38 PM

Diagnosis by LED Si10-417
4 Service Diagnosis
1.2 Outdoor Unit
Pair
The outdoor unit has one green LED (LED A) on the
PCB. The flashing green LED indicates normal condition
of microcomputer operation.
Si10-417.fm Page 4 Wednesday, September 22, 2004 6:38 PM

Si10-417 Diagnosis by LED
Service Diagnosis 5
Multi
There are green and red LEDs on the PCB. The flashing
green LED indicates normal equipment condition, and
the OFF condition of the red LED indicates normal
equipment condition.
(Troubleshooting with the green LED)
The LED A (green) of the outdoor unit indicate
microcomputer operation condition.
Even after the error is cancelled and the equipment
operates in normal condition, the LED indication
remains.
Si10-417.fm Page 5 Wednesday, September 22, 2004 6:38 PM

Diagnosis by Remote Controller Si10-417
6 Service Diagnosis
2. Diagnosis by Remote Controller
2.1 To know the error code
Method 1 1. When the timer cancel button is held down for 5
seconds, a “00” indication flashes on the temperature
display section.
Si10-417.fm Page 6 Wednesday, September 22, 2004 6:38 PM

Si10-417 Diagnosis by Remote Controller
Service Diagnosis 7
2. Press the timer cancel button repeatedly until a
continuous beep is produced.
The code indication changes in the sequence shown
below, and notifies with a long beep.
Note: 1. A short beep and two consecutive beeps indicate non-
corresponding codes.
2. To cancel the code display, hold the timer cancel
button down for 5 seconds. The code display also
cancels itself if the button is not pressed for 1 minute.
No. Code No. Code
100 16 A1
2U4 17 C4
3F3 18 C5
4E6 19 H9
5L5 20 J6
6A6 21 UA
7E5 22 A5
8LC 23 J9
9C9 24 E8
10 U0 25 P4
11 E7 26 L3
12 C7 27 L4
13 H8 28 H6
14 J3 29 H7
15 A3 30 U2
Si10-417.fm Page 7 Wednesday, September 22, 2004 6:38 PM

Diagnosis by Remote Controller Si10-417
8 Service Diagnosis
Method 2
1. Enter the diagnosis mode.
Press the 3 buttons (TEMP,TEMP, MODE)
simultaneously.
The digit of the number of tens blinks.
Try again from the start when the digit does not
blink.
2. Press the TEMP button.
Press TEMPor TEMPand change the digit until
you hear the sound of “beep” or “pi pi”.
Si10-417.fm Page 8 Wednesday, September 22, 2004 6:38 PM

Si10-417 Diagnosis by Remote Controller
Service Diagnosis 9
3. Diagnose by the sound.
“ pi ” : The number of tens does not accord with the
error code.
“ pi pi ” : The number of tens accords with the error
code.
“ beep ” : The both numbers of tens and units accord
with the error code. (→See 7.)
4. Enter the diagnosis mode again.
Press the MODE button.
The digit of the number of units blinks.
5. Press the TEMP button.
Press TEMPor TEMP and change the digit until
you hear the sound of “beep”.
Si10-417.fm Page 9 Wednesday, September 22, 2004 6:38 PM