Daikin 2MXM50M User Manual

ESIE16-02B | Part 2. Troubleshooting 2.4. Component checklist
Page 54 4/04/17 | Version 1.1
RA R32 Split & multi split M-Series
2.4.2.7. Pressure sensor
PRELIMINARY ACTIONS
1. Switch off the Daikin unit via the user interface.
2. Switch off the Daikin unit with the field supplied circuit breaker.
3. Remove plate work when required.
PROCEDURE
1. Connect a pressure gauge to the high pressure service port and read the pressure.
2. From the graph below, determine the expected sensor output signal.
3. Power the Daikin unit.
4. Measure the voltage across high pressure sensor connector: pin 1-3 on the PCB; compare the measured voltage with the
expected voltage.
Technical specification Description
The pressure sensor is an analog pressure sensor. The pressure sensor measures the pressure in the high pressure
section of the refrigerant circuit.
Location
Piping diagram Wiring diagram Switch box Component overview of unit
See "Outdoor unit" on
page 104.
See "Outdoor unit" on
page 99.
See "Outdoor unit" on
page 111.
See "Outdoor unit" on page 110.
Check procedure
Electrical check
INFORMATION
To know where to plug in the pressure sensor connector, see "Component checklist" on page 111.
-5.1
-0.5 0 0.5 1 1.5 2 2.5 3 3.5 4
0
5.1
10.2
15.3
20.4
25.5
30.6
35.7
40.8
45.9
51.0
Detected Pressure
P
H
(kg/cm
2
)
P
H = 1.38V H -0.69
V
H : Output Voltage (High Side) V DC
Output Voltage (V H , V L )
High Pressure (P H )

Daikin 2MXM50M Specifications

General

Type	Air conditioner outdoor unit
Multi-split	-
Product color	White
Gas hose diameter	9.5 mm
Drain hose diameter	16 mm
Liquid hose diameter	6.35 mm
Outdoor unit depth	285 mm
Outdoor unit width	765 mm
Outdoor unit height	550 mm
Outdoor unit weight	41000 g
Outdoor unit noise level	486.35 dB
Outdoor unit package depth	357 mm
Outdoor unit package width	900 mm
Outdoor unit package height	614 mm
Outdoor unit package weight	43000 g
Outdoor unit sound power level	62 dB
Current	16 A
AC input voltage	220 - 240 V
AC input frequency	50 Hz