Midea M-Thermal Series Service Manual page 37

M‐Thermal Split
2.4 Check Buttons
Refrigerant system SW2 check button
Button SW2 is used to check the parameters of the refrigerant system. Refer to Table 4‐2.2 First, press Button SW2 for 3
seconds and the first parameter (operating mode) will be displayed. Then, on each subsequent press, the next parameter
is displayed.
Table 4‐2.4: SW2 system check
Number Parameters displayed on digital display
1 Mode
2 Fan speed
3 Capacity requirements
4 Capacity requirements(Correct)
5 Frequency limit code
6 T3: Condenser temperature (°C)
7 T4: Outdoor ambient temperature (°C)
8 Tp: Discharge temperature (°C)
9 Th: Suction temperature (°C)
10 TF: Radiator temperature (°C)
11 Electric Expansive Valve
12 Actual current
13 Compressor current
14 Voltage AC
15 Voltage DC
16 Pressure
17 Software version
18 Last fault
19 ‐‐
36
Remarks
0: standby; 2: cooling; 3: heating; 4 forced cooling.
The fan speed index is related to the fan speed in rpm as described in Table 3‐4.1 in Part 3, 4.6
"Outdoor Fan Control".
Compressor frequency
Compressor frequency
0: Without restriction
1: Compressor frequency restriction by o
2:
Compressor frequency restriction by c
3:
Compressor frequency restriction by actual c
4:
Compressor frequency restriction by
5:
Compressor frequency restriction by
6:
Compressor frequency restriction by
7:
Compressor frequency restriction by pressure
When no decimal point is displayed:
Temperature is ≥ ‐9°C
Actual value = value displayed
When decimal point is displayed between the two digits:
Temperature is ≤ ‐10°C
Actual value = value displayed x ‐10
Example: "1.2" indicates ‐12°C
When the temperature < 100 °C, actual value = value displayed. When the
temperature ≥ 100 °C, actual value = value displayed × 10
When no decimal point is displayed:
Temperature is ≥ ‐9°C
Actual value = value displayed
When decimal point is displayed between the two digits:
Temperature is ≤ ‐10°C
Actual value = value displayed x ‐10
Example: "1.2" indicates ‐12°C
Actual value = value displayed
Steps = value displayed × 8
Actual value = value displayed
Actual value = value displayed
Actual value = value displayed × 10
Actual value = value displayed × 10
Actual value = value displayed
Version number
"nn" is displayed if no error or protection events have occurred since start‐up
Midea CAC Confidential
utdoor ambient temperature
ondenser temperature
urrent
voltage AC
radiator temperature
Discharge temperature
201909