Electronic Control Function - Pioneer YN018GMFI16M2D Service Manual

8. Electronic control function

8.1 Abbreviation
T1: Indoor ambient temperature
T2: Coil temperature of indoor heat exchanger middle.
T2B: Coil temperature of indoor heat exchanger outlet.
T3: Coil temperature of outdoor heat exchanger
T4: Outdoor ambient temperature
T5: Compressor discharge temperature
Ts: Setting temp.
8.2 Electric control working environment.
8.2.1 Input voltage: 230V.
8.2.2 Input power frequency:60Hz.
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.
8.2.6 Swing motor: DC12V.
8.3 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 2s)
•
In compressor pre-heating, The LED displays "- -"
•
In protection or malfunction, the LED displays error code or protection code.
8.4 Outdoor unit point check function
There is a check switch in outdoor PCB.
Push the switch SW1 to check the states of unit when the unit is running. The digital display tube will display
the follow procedure when push SW1 each time.
Display
1 Indoor unit capacity demand code
2 Outdoor unit running mode code
3
Amendatory capacity demand code
4 Outdoor unit fan motor state
5 Evaporator outlet temp. for 1# indoor unit
6 Evaporator outlet temp. for 2# indoor unit
7
Evaporator outlet temp. for 3# indoor unit
8 Evaporator outlet temp. for 4# indoor unit
9 Condenser pipe temp. (T3)
10
Outdoor ambient temp.(T4)
11 Compressor discharge temp.(Tp)
Remark
Off:0, Cooling:1, Heating:2
Off:0, Low speed:1, High speed:2
Actual data,(If the temp. is lower than -9 degree, the digital
display tube will show "-9".If the temp. is higher than 70
degree, the digital display tube will show "70". If the indoor unit
is not connected, the digital display tube will show: "――")
Actual data (If the temp. is lower than 0 degree, the digital
display tube will show "0".If the temp. is higher than 99 degree,
the digital display tube will show single digit and tens digit.
(For example, the digital display tube show "0.5",it means the