Daikin EWYQ180DAYN Сервис мануал онлайн [513/524] 403920

Daikin EWYQ230DAYN Сервис мануал онлайн [513/524] 403923
ESIE06-05 Maintenance
Part 5 – Maintenance 5–5
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5
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5
Expansion valve The expansion valve will allow the correct amount of refrigerant to enter the evaporator to match the
cooling load (by keeping a constant superheat). Follow the instructions below to check the expansion
valve.
Check the superheat setting.
Inspect the LP sensor operation (offset). Compare the controller valve with a pressure gauge.
Inspect the suction temperature sensor (offset). Compare the controller valve with a temperature
probe.
Flow switch and
pump interlock
Follow the instructions below to check the flow switch and the pump interlock.
Check operation by ohmmeter after disconnecting the wires to the field terminals and simulating
flow and no-flow conditions.
Inspect the flow-switch for possible corrosion (glycol applications). Check electrical connections for
shunts or bridges.

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