Inspecting The Cooling Water Concentration; Inspecting The Oil Pressure Switch; Inspecting The Cooling Water Temperature Sensor - Daikin GYEQ20AN Service Manual

Inspecting the Outdoor Unit

1.19 Inspecting the Cooling Water Concentration

Inspect the cooling water concentration using a coolant tester.
The concentration should be 50%.

1.20 Inspecting the Oil Pressure Switch

Test the continuity between A and B terminals with a tester.
Stopped
Running
With the oil pressure switch removed, check the engine oil pressure using a Bourdon tube
pressure gauge via a joint.
Engine oil pressure

1.21 Inspecting the Cooling Water Temperature Sensor

Test the resistance between A and B terminals with a tester.
For the temperature/resistance characteristics, see page 225 [Table7.3 List of resistance/
temperature characteristics of outdoor unit sensors].
187
Adjusting screw
Silver cylinder
Cover
Prism
Status
What to measure
Focusing ring
Lens
1.40
60
1.35
50
1.30
40
1.25
1.20
30
1.15
20
1.10
10
0 0
Basal line
020937-00E
Measured value
Continuity exists
No continuity
Measured value
0.343 to 0.392 MPa
Terminal A
Terminal B
020903-00E
025953-00E
SiAUY361411EA
-50
-40
30
20
10
0
Terminal A
Terminal B
Parts Inspection