Inspecting The Compression Pressure; Inspecting The Belt - Daikin GYEQ20AN Service Manual

SiAUY361411EA
1.8

Inspecting the Compression Pressure

1. Disconnect all cylinders' ignition coil primary side wiring terminals.
2. Remove the spark plug from the cylinder being tested, and then attach a compression
3. Measure the pressure while the system is running in manual/auto operation mode. (The
∗ When you want to operate the starter using the checker during measurement, set the throttle
Warning Be sure to remove the cables from the ignition coil pre-event side before measurement;
otherwise the engine could run during measurement, posing a danger.
If the flywheel does not rotate smoothly when turned by hand, chances are that the engine is
seized or locked.
1.9

Inspecting the Belt

Visually inspect the compressor drive belt, generator belt, engine pulley, compressor pulley,
and generator pulley.
• Check for any cracks or abnormal wear.
• Check the pulley surfaces and belt for oil stains.
• Check if the belt tension is correct. (See Part 7 Maintenance / Service Data.)
• Check the pulley surfaces for scratches and foreign matter.
Parts Inspection
gauge.
throttle opening degree should be the startup opening degree [120 pulses].)
to the full opening degree with the checker and unplug the mixer connector before
performing measurement.
After you have finished measurement, re-plug the connector and set the throttle to the fully
closed opening degree using the checker.
Forgetting to set the throttle to the fully closed opening degree could be very dangerous
because the engine will rev up to a high speed the next time the system is started.
Engine type Standard value (MPa)
3GPH88
4GPH88
Variation (±)
1.1 0.2
1.1 0.2
Inspecting the Outdoor Unit
Full limit (MPa)
0.59
0.59
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