Daikin GYEQ20AN, Руководство по обслуживанию

Страница: 202 / 245

Inspecting the Outdoor Unit SiAUY361411EA
191 Parts Inspection
1.25 Inspecting the Solenoid Valves
1. While the unit is running, turn ON each solenoid valve either directly or via the actuator
check function, and check the output voltage and operating noise at the output connector
(shown in the figure above) of the circuit board.
2. If the output voltage is significantly different, check the continuity between the solenoid coil
and circuit board harness as well as the coil resistance with the power OFF.
3. While the unit is running, turn OFF each solenoid valve, and check if there is a temperature
difference between the upstream and downstream of the solenoid valve. If there is no
temperature difference, chances are that the solenoid valve has been opened by foreign
matter caught in it.
4. While the unit is running, check if the refrigerant flowing noise changes as expected when
each solenoid valve turns from ON to OFF.
„
Output voltage
„
Inspecting the solenoid valves
Inspect each solenoid valve coil by measuring the resistance between its connectors.
The measured value is 1.2 k
Ω
for items marked with
∗
.
Parts to inspect Measuring points
With actuator check
ON or solenoid valve
ON while running
Solenoid valve 31 Between power supply circuit board's CN112-1 and -3 Actuator CH35 200 V
Solenoid valve 1 Between power supply circuit board's CN113-1 and -3 Actuator CH13 200 V
Solenoid valve 2
Between power supply circuit board's CN114-1 and -3
Actuator CH14 200 V
Solenoid valve 37 Actuator CH41 200 V
Solenoid valve 3 Between power supply circuit board's CN115-1 and -3 Actuator CH15 200 V
Solenoid valve 12
Between power supply circuit board's CN116-1 and -3
Actuator CH69 200 V
Solenoid valve 3E
∗
Actuator CH76 200 V
Solenoid valve 6 Between power supply circuit board's CN124-1 and -3 Actuator CH61 200 V
Solenoid valve 9 Between power supply circuit board's CN125-1 and -3 Actuator CH64 200 V
Solenoid valve 10
∗
Between power supply circuit board's CN126-1 and -3 Actuator CH65 200 V
Solenoid valve 4 Between power supply circuit board's CN127-1 and -3 Actuator CH16 200 V
Solenoid valve 7 Between power supply circuit board's CN128-1 and -3 Actuator CH62 200 V
Solenoid valve 8
Between power supply circuit board's CN129-1 and -3
Actuator CH63 200 V
Solenoid valve 3F
∗
Actuator CH77 200 V
Solenoid valve 12 Between sub circuit board's CN303-1 and -3 Actuator CH43 200 V
Solenoid valve 13 Between sub circuit board's CN304-1 and -3 Actuator CH71 200 V
Solenoid valve 32 Between sub circuit board's CN305-1 and -3 Actuator CH36 200 V
Solenoid valve 3A Between sub circuit board's CN306-1 and -3 Actuator CH72 200 V
Solenoid valve 3B Between sub circuit board's CN307-1 and -3 Actuator CH73 200 V
Solenoid valve 3C Between sub circuit board's CN308-1 and -3 Actuator CH74 200 V
Solenoid valve 3D Between sub circuit board's CN309-1 and -3 Actuator CH75 200 V
Solenoid valve 3G Between sub circuit board's CN310-1 and -3 Actuator CH78 200 V
Solenoid valve 3H Between sub circuit board's CN311-1 and -3 Actuator CH79 200 V
Measuring points Measured value
Between solenoid valve terminals 0.95 k
Ω