18seer thermostat manual

Unitary Ducted Split AC
10
Fig.19
4.7 Lock Function
This function can be activated by simultaneously pressing the “▼/▲” button for ve seconds on
the main page, and be canceled by another press.
4.8 Error Display
For instance, if the display board ambient temperature sensor error occurs, the error
code“F0”and related error symbol will be displayed.
Table 5 Error List
SN Error Code Error Description
1 F0 Indoor Ambient Temperature Sensor Error
2 E1 Compressor High Pressure Protection
3 E3 Compressor Low Pressure Protection
4 E4 Compressor Discharge Temperature Protection
5 E5 Compressor Overload Protection
6 E8 Over High Tube Temperature Protection of the Outdoor Unit
7 F2 Outdoor Unit Tube Temperature Sensor Error
8 F4 Discharge Temperature Sensor Error
9 e5 Main Board Discharge Temperature Sensor Error
10 F3 Main Board Ambient Temperature Sensor Error
11 E6 Communication between the Main Board and the Display Board
12 EE Main Board Memory Chip Error
13 c5 Jumper Error
14 PL DC Bus Under-voltage Protection
15 PH DC Bus Over-voltage Protection
16 PA AC Current Protection (Input Side)
17 H5 IPM Error
18 Hc PFC Error
19 Lc Startup Failure
20 P0 Drive Module Reset Failure
21 P5 Compressor Over-current
22 Pc Sensing Circuit Error or Current Sensor Error
23 H7 Compressor Motor Desynchronization
24 P6 Communication Error between the Main Board and the Drive
25 P8 IPM or PFC Over-temperature Protection
26 P7 IPM or PFC Temperature Sensor Error
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