Inspecting The Cooling Water Level; Inspecting The Water Motor-Operated Valve - Daikin GYEQ20AN Service Manual

Inspecting the Outdoor Unit

1.16 Inspecting the Cooling Water Level

Check the water level in the reservoir tank.
If the water level is below the LOW tick mark, chances are that the cooling water is leaking or
was not refilled during the previous periodic inspection.
Check for any leaks, and refill cooling water.

1.17 Inspecting the Water Motor-operated Valve

Cooling water pump
∗ Reference value
1. Using a tester, check if the output voltage requirements specified above are met.
2. If the voltage is significantly different than specified above, stop the system using the
3. If the harnesses and connectors are OK, then check each component.
Inspect the cooling water pump by measuring the resistance between its terminals.
Between terminals #1 (red) and #2 (white)
Between terminals #1 (red) and #3 (black)
Between terminals #2 (white) and #3 (black)
∗ At 20°C (reference value)
185
Output voltage
Parts to inspect
DCBL circuit board Between the
phases of CN206
onboard checker and wait for 5 minutes; then, with the power OFF, check the harness for
continuity and the junction connectors for contact failure using a tester.
Inspecting the cooling water pump
Measuring points
FULL level
LOW level
023306-00E
Measuring points
SiAUY361411EA
While system running
(with actuator check CH21 ON)
∗
200±10 V AC
Measured value (Ω)
17.5±10%
17.5±10%
17.5±10%
Parts Inspection
During
stop
0 V
∗