Johnson Controls R SERIES Installation And Maintenance Manual page 57

Inverter-driven air conditioning unit
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F1 Malfunction of Evaporator Temperature Sensor
Check if the evaporator
mainboard is inserted on the
the temperature sensor and
measure if its resistance is
F2 Malfunction of Condenser Temperature Sensor
mainboard is inserted on the
the temperature sensor and
measure if its resistance is
Malfunction of
evaporator
temperature
sensor
temperature sensor on
needle stand correctly
Yes
Disconnect
normal
Yes
Replace the
indoor
mainboard
Malfunction of
condenser
temperature
sensor
Check if the condenser
temperature sensor on
needle stand correctly
Yes
Disconnect
normal
Yes
Replace the
outdoor
mainboard
49
Correctly insert the
temperature
No
sensor on the
needle stand
Replace the
No
temperature
sensor
Correctly insert the
No
temperature sensor
on the needle stand
No
Replace the
temperature sensor

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