Friedrich AS - W126BMS0, Service Manual

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Part 4 Trouble Shooting
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Outdoor Unit Error
1) 2 LED Type
LED2
(Red, 10 Digit)
LED1
(Green, 1 Digit)
Error
Code
Description
21 DC Peak (IPM Fault) 2 Times 1 Time 2 Times 1 Time
22 CT 2(Max CT) 2 Times 2 Times 2 Times 2 Times
23 DC Link Low Volt 2 Times 3 Times 2 Times 3 Times
25 Low wire volt/ high wire volt 2 Times 5 Times 2 Times 5 Times
26 DC Comp Position Error 2 Times 6 Times 2 Times 6 Times
27 PSC Fault Error 2 Times 7 Times 2 Times 7 Times
29 Inverter Compressor over-current 2 Times 9 Times 2 Times 9 Times
31 CT error (low current) 3 Times 1 Time 3 Times 1 Time
32 D-Pipe High (INV) 3 Times 2 Times 3 Times 2 Times
37 Failure Compression Ratio 3 Times 7 Times 3 Times 7 Times
40 CT Sensor (Open / Short) 4 Times - 4 Times -
41 INV. D-Pipe Th Error (Open / Short) 4 Times 1 Time 4 Times 1 Time
44 Outdoor Air Th Error (Open / Short) 4 Times 4 Times 4 Times 4 Times
45 Cond. Middle Pipe Error (Open / Short) 4 Times 5 Times 4 Times 5 Times
48 Cond. Out Pipe Error (Open / Short) 4 Times 8 Tiems 4 Times 8 Tiems
53 Communication Failure(Outdoor Unit
↔
Indoor Unit) 5 Times 3 Times 5 Times 3 Times
60 EEPROM Check Sum Error 6 Times - 6 Times -
61 Cond. Pipe High 6 Times 1 Time 6 Times 1 Time
62 Heatsink High 6 Times 2 Times 6 Times 2 Times
63 Cond. Pipe Low 6 Times 3 Times 6 Times 3 Times
65 Heatsink Th Error (Open/Short) 6 Times 5 Times 6 Times 5 Times
67 Outdoor BLDC Fan Lock 6 Times 7 Times 6 Times 7 Times
72 Failure 4Way 7 Times 2 Times 7 Times 2 Times
73 IGBT Damage 7 Times 3 Times 7 Times 3 Times
Error Indication
Indoor Unit Outdoor Unit
LED2 LED1 Red Green