Outdoor Unit | Installation Manual |
12TROUBLESHOOTING
You can perform fault diagnosis of the outdoor unit with the LEDs on the P.C. board of the outdoor unit in addition to using the check codes displayed on the wired remote controller of the indoor unit.
Use the LEDs and check codes for various checks. Details of the check codes displayed on the wired remote controller of the indoor unit are described in the Installation Manual of the indoor unit.
Verifying Fault code status (Outdoor control board)
1.Check that DIP switch SW803 is set to off.
2.Record the states (on or off) of LED 800 to LED 804 (Display mode 1).
3.Press SW800 for at least 1 second. The LED status changes to display mode 2.
4.Since display mode 1 covers multiple faults with the same code display, mode 2 must also be used to determine the final fault. Use the status recorded for LED 800 to LED 804 in display mode 1 (Item 2 above) and combine it with the status for the same LED’s in display mode 2 (Item 3 above) to determine the complete fault code using the chart below.
Verifying Fault code status stored in memory (Outdoor control board)
1.Check that DIP switch SW803 is set to on.
2.Record the states (on or off) of LED 800 to LED 804 (Display mode 1).
3.Press SW800 for at least 1 second. The LED status changes to display mode 2.
4.Since display mode 1 covers multiple faults with the same code display, mode 2 must also be used to determine the final fault. Use the status recorded for LED 800 to LED 804 in display mode 1 (Item 2 above) and combine it with the status for the same LED’s in display mode 2 (Item 3 above) to determine the complete fault code using the chart below.
NOTE
An outside air temperature (TO) sensor error can be checked only when an error occurs.
No. | Cause |
| Display mode 1 |
|
| Display mode 2 |
| |||||
D800 | D801 | D802 | D803 | D804 | D800 | D801 | D802 | D803 | D804 | |||
|
| |||||||||||
1 | Normal | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● |
2 | Discharge (TD) sensor error | { | { | ● | ● | { | ● | ● |
| ● | ● |
3 | Heat exchanger (TE) sensor error | { | { | ● | ● | { | ● |
|
| ● | ● |
4 | Heat exchanger (TL) sensor error | { | { | ● | ● | { |
|
|
| ● | ● |
5 | Outside air temperature (TO) sensor error | { | { | ● | ● | { | ● | ● | ● |
| ● |
6 | Suction (TS) sensor error | { | { | ● | ● | { | ● | ● |
|
| ● |
7 | Heat sink (TH) sensor error | { | { | ● | ● | { |
| ● |
|
| ● |
8 | Outdoor temperature sensor (TE/TS) connection | { | { | ● | ● | { |
|
|
|
| ● |
error |
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9 | Outdoor EEPROM error | { | { | ● | ● | { |
|
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10 | Compressor lock | ● | ● | { | ● | { |
| ● | ● | ● | ● |
11 | Compressor lock | ● | ● | { | ● | { | ● |
| ● | ● | ● |
12 | Current detection circuit error | ● | ● | { | ● | { |
|
| ● | ● | ● |
13 | Thermostat for compressor activated | ● | ● | { | ● | { | ● | ● |
| ● | ● |
14 | Model data not set | ● | { | { | ● | { | ● |
| ● |
| ● |
(on the service P.C. board) |
|
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15 | ● | { | { | ● | { |
| ● |
|
|
| |
16 | Discharge temperature error | { | { | { | ● | { |
|
| ● | ● | ● |
17 | Abnormal power | { | { | { | ● | { |
| ● |
| ● | ● |
(open phase detected or abnormal voltage) |
|
| |||||||||
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|
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| |
18 | Heat sink overheat | { | { | { | ● | { |
|
|
| ● | ● |
19 | Gas leak detected | { | { | { | ● | { |
|
|
|
| ● |
20 | { | { | { | ● | { |
|
| ● | ● |
|
(●:OFF {:ON 
:Flashing)
EN
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