DM16-01.01.11-01en
Service
manual
Multi DC inverter R410A. Outdoor unit
29
10.
Electronic control function
10.1 Abbreviation
T1: Indoor ambient temperature
T2: Coil temperature of indoor heat exchanger middle.
T2B: Coil temperature of indoor heat exchanger outlet(This sensor is located in outdoor unit)
T3: Coil temperature of outdoor heat exchanger
T4: Outdoor ambient temperature
T5: Compressor discharge temperature
Ts: Setting temperature
10.2 Electric control working environment.
8.2.1 Input voltage: 198V~264V.
8.2.2 Input power frequency:50Hz.
8.2.3 Indoor fan normal working amp. is less than 1A.
8.2.4 Outdoor fan. normal working amp. is less than 1.5A.
8.2.5 Four-way valve normal working amp. is less than 1A.
10.3 Outdoor unit’s digital display tube
There is a digital display tube in outdoor PCB.
Digital display tube display function
In standby , the LED displays “- -”
In compressor operation, the LED display the running frequency,
In defrosting mode, The LED displays “dF” or alternative displays between running frequency and
“dF”(each displays 0.5s)
In compressor pre-heating, The LED displays “PH” or alternative displays between running frequency
and “PH”(each displays 0.5s)
During the oil return process, The LED displays “RO” or alternative displays between running
frequency and “RO”(each displays 0.5s)
In low ambient cooling mode, the LED displays “LC” or alternative displays between running
frequency and “LC”(each displays 0.5s)
In forced cooling mode, the LED displays “FC” or alternative displays between running frequency and
“FC”(each displays 0.5s)
When PFC module protection occurs three times within 15 minutes, the LED displays “E6” or
alternative displays between running frequency and “E6”(each displays 0.5s)
In protection or malfunction, the LED displays error code or protection code.
10.4 Outdoor unit point check function
There is a check switch in outdoor PCB.
Press the switch N times it will display the content corresponding to No. N. After getting into the check function, it
will display No. N with 1.5s, meanwhile the low bit decimal of digit display flashing, indicated to get into the check
function display. After 1.5s, it will display the content corresponding to No. N.
the digital display tube will display the follow procedure when push SW1 each time.
Display
Remark
0
Normal display
Display running frequency, running state or malfunction code
1
No. of indoor units in good connection
Actual data
2
Outdoor unit running mode code
Standby:0,Fan only 1, Cooling:2, Heating:3, Forced cooling:4 Forced
defrosting:5
