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SINCLAIR
Possible cause:
(1) Incorrect connection of the communication cord; (2) Display board error; (3) Main board error
Troubleshooting:
2.5 F3, F4, F6, Fd, FE, FL Temperature sensor Error
Fault error: F3, F4, F6, Fd, FE, or FL (one or more of these codes may be displayed), for example,
Applicable model: all models
Error judgment condition and method: F3, F4, F6, Fd, FE, or FL is displayed on the wired controller
(F3: Outdoor ambient temperature sensor error; F4: Discharge temperature sensor error; F6: Tube
temperature sensor error (for outdoor heat exchanger); Fd: Suction temperature sensor error; FE: Upper
temperature sensor error of the water tank; FL: Lower temperature sensor error of the water tank). The
troubleshooting method is shown in the flowchart below.
Possible cause:
(1) Incorrect connection of temperature sensor; (2) Temperature sensor error; (3) Mainboard error
AIR SOURCE HEAT PUMP WATER HEATER SERVICE MANUAL
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