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This is the only guide I’ve been able to find pertaining to AUX brand Mini-Split Heat Pumps. Full Aux Error & Trouble Code Service Guide.
Wall mounted / Floor standing air conditioner 4
1、General index 4
2、Troubleshooting Guide 6
（1） E0-Overcurrent Protection of Indoor Unit 7
（2） E1-internal temperature sensor error 8
（3） E2-external coil sensor error 9
（4） E3-internal coil sensor error 10
（5） E4-Internal fan error of wall mounted air conditioner（PG motor） 11
（6） E4-Internal fan error of wall mounted air conditioner (DC motor) 12
（7） E4-Sliding door error of floor standing 14
（8） E5(5E)-Internal and external communication error 15
（9） E8-Communication Failure between Display board and Main Control Panel 17
（10） Eb-Indoor EE Failure 18
（11） F0-External DC fan error (3-core terminal motor) 19
（12） F1-Module protection error 20
（13） F2-PFC protection error 22
（14） F3-Compressor out-of-step error 23
（15） F4-Exhaust sensor error 25
（16） F5-Compressor top head sensor error 26
（17） F6-external temperature sensor error 27
（18） F7-OVP or UVP error 28
（19） F8-main external control panel and module panel communication error（ exclusive of external machine of single panel） 30
（20） F9-outdoor EE error 31
（21） FA-recirculated sensor error (for models with electronic expansion valve) 32
（22） P2-High-voltage Switch Protection 33
（23） P3-Liquid Deficiency Protection 34
（24） P4-Refrigeration Overload Protection 35
（25） P5-Exhaust Protection 36
（26） P6-Indoor High Temperature Protection 37
（27） P7-Anti-freezing Protection in Refrigeration Room 38
（28） P8-Overcurrent Protection 39
（29） Function protection prompt of frequency conversion external machine 40
（30） Troubleshooting Guide on Category-L Failures (Subdivided Failures) 42
3、Common Parameters 43
(1) Display error code of indoor unit: fix speed A/C & E1, E2, E3 and E4 Errors 43
(2) Display error code of outdoor unit’s indicator lights: 44
Portable A/C 46
1. General index 46
2. Troubleshooting Guide 47
1) Internal temperature sensor error 47
2) Internal coil sensor error 49
3) DC motor error 50
4) Communication Failure between Display board Main Control Panel 52
5) Full Water Alarm 53
Wall mounted / Floor standing air conditioner
1、General index
No.
Error Name
Reference Code
1
Overcurrent Protection of Indoor Unit
E0
2
Internal temperature sensor error
E1
3
External coil sensor error
E2
4
Internal coil sensor error
E3
5
Internal fan error of wall mounted A/C (PG motor)
E4
6
Internal fan error of wall mounted A/C (DC motor)
E4
7
Sliding door error of floor standing
E4
8
Internal and external communication error
E5（5E）
9
Communication Failure between Display board and Main
Control Panel
E8
10
External DC fan error (3-core terminal motor)
F0
11
Module protection error
F1
12
PFC protection error
F2
13
Compressor startup error
F3
14
Exhaust sensor error
F4
15
Pressing top head sensor error
F5
16
External temperature sensor error
F6
17
OVP or UVP error
F7
18
F8
19
Outdoor EE error
F9
20
Recirculated sensor error (four-way valve switch error)
FA
21
Cabinet internal fan error (see E4 for troubleshooting)
Fb
22
High-voltage Switch Protection
P2
23
Liquid Deficiency Protection
P3
24
Refrigeration Overload Protection
P4
25
Exhaust Protection
P5
26
Indoor High Temperature Protection
P6
27
Anti-freezing Protection in Refrigeration Room
P7
28
Overcurrent Protection
P8
29
Function protection prompt of frequency conversion
external machine
See the Error List
30
Troubleshooting Guide on Category-L Failures (Subdivided
Failures)
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