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Top 10 Install Oopsies
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Wrong communication wire used – must use Fujitsu pink OR seek approval on alternative prior to installation.
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Piping accessories installed in incorrect orientation.
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Wrong address setting. Mixing the rotatory switches, not setting them, mismatching…
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Power not applied to ODU 12 hours before start-up
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Not setting (F) 21-02 Outdoor Unit "Priority Given To the Master Indoor Unit" creating complications in how mode can change
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Incorrect connection of X1X2 and Y1Y2 on indoor units
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Need to measure terminal resistance at various points along communication network. Failure to have correct setting of 5-4 terminal resistors when multiple refrigeration circuits are connected on Z1Z2 or requiring signal amplifier to support size of communication wiring
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Not connecting outdoor units on communication network
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Not setting static pressure on ducted units
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Not setting system to sense temperature on the thermostat
