Information Inquiry - Century COMFORT-AIRE VMH-SG Series Service Manual

4. Information Inquiry

• To enter engineer mode, in power-on or standby mode, and in non-locked state, press the key combination "ON/OFF
+ Air Speed" for 7s:
• After entering the engineer mode, the remote control will display icons of "Auto, Cool, Dry, Heat", and the Battery
icon; at the same time, it will also display the numeric code of the current engineer mode (for the initial engineer
mode, the numeric code displayed is 0), and all other icons are inactive.
• In engineer mode, the value of the current numeric code can be adjusted circularly through the Up/Down key, with
the setting range of 0 to 30.
Code
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Exit of engineer mode:
1)In engineer mode, press the key combination of "On/Off + Air speed" for 2s;
2)The engineer mode will be exited if there are no valid key operations for continuous 60s.
Query Content
Error code
Room temperature
Indoor coil temperature
Outdoor coil temperature
Ambient temperature
Discharge temperature
Compressor Target Frequency FT
Compressor Running Frequency Fr
Unit Current dL
Outdoor AC Voltage Uo
Current indoor capacity test state Sn
Reserve
Set Speed Pr of the outdoor fan
Opening Lr of EEV
Actual Running Speed ir of the indoor fan Indoor fan speed=value*8
Indoor Humidity Hu
Set Temperature TT after compensation
Reserve
Reserve
/
Indoor Target Frequency oT
Reserve
 Troubleshooting 8
Troubleshooting 8
Service Manual - VMHxxSG
Additional Notes
Refer to next list of error code
T1 temperature
T2 temperature
T3 temperature
T4 temperature
TP temperature
Targeted Frequency
Actual Frequency
N/A
N/A
N/A
Outdoor fan speed=value*8
EXV opening angle-value*8
N/A
N/A
N/A
N/A
N/A
N/A
