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1. DESCRIZIONE DEI COMPONENTI
GB
GB
Main parts check
1. Temperature sensor checking
Disconnect the temperature sensor from PCB, measure the resistance value with a tester.
Temperature Sensors.
Room temperature(T1) sensor,
Indoor coil temperature(T2) sensor,
Outdoor coil temperature(T3) sensor,
Outdoor ambient temperature(T4) sensor,
Compressor discharge temperature(TP) sensor.
Measure the resistance value of each winding by using the multi-meter.
Disconnect the temperature sensor from the PCB, measure the resistance value with a tester.
Temperature sensors:
Indoor temperature sensor (T1)
Evaporator Battery Temperature Sensor (T2)
Condenser Battery Temperature Sensor (T3)
Outdoor temperature sensor (T4)
Compressor Exhaust Temperature Sensor (T5)
9. FUNCTIONAL ANOMALIES
42 Active Frequency Limitations
Bit7
Frequency limit caused by IGBT
radiator
The displayed value is the hex number. For exam-
ple, display shows 2A, then Bit 5 = 1, Bit 3 = 1, Bit
1 = 1.It Means the frequency limit caused by T4,
T3 and current.
Bit6
Frequency limit caused by PFC
Bit5
Frequency limit caused by T4.
Bit4
Frequency limit caused by T2.
Bit3
Frequency limit caused by T3.
Bit2
Frequency limit caused by T5.
Bit1
Frequency limit caused by voltage
Bit0
Frequency limit caused by voltage
43 Average value of T2
(Sum value T2 of all indoor units) / (Number of internal units in good connection) (cooling: T2B,
heating: T2)
44 Fan motor status of the outdoor unit
0=off, 1=high speed, 2= midle speed, 3= low speed, 4=Breeze, 5= Super Breeze
45 The last error or security code
00 Means any malfunction and protection
9.3 Check temperature sensors
