Daikin EUWL KZW1 Series Service Manual page 133

ESIE-0303
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.
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Flow switch and Follow the instructions below to check the flow switch and the pump interlock.
pump interlock
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Part 5 – Maintenance
Check the superheat setting.
Inspect the bulb / power-head capillary connection (no chaffing).
Inspect the equaliser line visually.
Inspect the feeler bulb suction pipe connection / insulation.
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.
Maintenance
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