Midea ATOM B Series Service Manual page 42

2.2.3 System check button
On pressing Spot check button, the parameters listed in Table 5-2.6 will be displayed in sequence.
Table 5-2.7: 28/36/42/48/56/60 model system check
No.
0
Operating frequency
1 Operating mode
2 Operating fan speed level
3 Total capacity requirement of indoor units
4 Total capacity requirement for the modified ODU
5
T3 Condenser
6
T4 Outdoor ambient
7
TP discharge
8
TF invert module
9 TL refrigerant cooling tube temperature (°C)
10 EXVA position
11 Actual current (A)
12 Inverter compressor current (A)
13 Actual voltage (V)
14 DC bus voltage (V)
15 Indoor heat exchanger pipe (T2/T2B) average temperature (°C)
16 T2A condenser temperature
17
Total number of IDUs
18
Number of Operating IDUs
19 Model name
20
System address
21 Compressor error code
22 Priority mode
23 Program version number
24-33 Last 10 times error protection code
34 Display "--"
Notes:
1. Operating mode:

0: standby; 2: cooling; 3: heating; 4: forced cooling.
2. The fan speed index is related to the fan speed in rpm and can take any integer value in the range 0 (0-off) to 15 (fastest). Please refer to
note 2 in Part 4.
3. Priority mode:

0: first ON priority; 1: cooling priority; 2: Automatic selection of priority mode; 3: heating only; 4: cooling only; 5: heating priority
4. "nn" is displayed if no error or protection events have occurred since start-up; it displays all error protection code if the number of error protection
codes are less than 10 since start-up.
2.2.4 Digital display output
Table 5-2.8: Digital display output in different operating states
Outdoor unit state
Standby
Normal operation
Error or protection
System check
Parameters displayed on DSP
temperature(°C)
temperature(°C)
temperature(°C)
Temperature(°C)
4
Parameters displayed on DSP
The number of indoor units in communication with the outdoor unit
Compressor frequency
Error or protection code
Refer to Table 5-2.6
Atom B Series VRF 50/60Hz
Remarks
Actual value = value displayed
Refer to Note 1
Refer to Note 2
Actual value = value displayed
Actual value = value displayed
Actual value = value displayed
Actual value = value displayed
Actual value = value displayed
Actual value = value displayed× 8
Actual value = value displayed
Actual value = value displayed
Actual value = value displayed
Actual value = value displayed
Actual value = value displayed
Actual value = value displayed
Actual value = value displayed
ODU address in the centralized control
system
Refer to Note 3
Refer to Note 4
Table 4-1.3
41