Gree GRS-1.5/D150ANbA-K, Service Manual

Page: 59 / 81

GREE AIR SOURCE HEAT PUMP WATER HEATER SERVICE MANUAL
57
E6 Communication fault
Check whether the
Communication cable is
correctly connected.
Check whether the wired
controller is normal.
Check whether the
Communication cable is
accessible.
Re-connect the
communication cable.
Replace the
Communication cable.
Replace the wired
controller.
N
Y
N
Y
Y
Replace the wired
controller.
N
2.4 F3, F4, F6, Fd, FE, FL Temperature sensor Fault
Fault error: F3, F4, F6, Fd, FE, or FL (one or more of these codes may be displayed), for example,
Applicable mode: all modes
Fault judgment condition and method: F3, F4, F6, Fd, FE, or FL is displayed on the wired controller
(F3: Outdoor ambient temperature sensor fault; F4: Air exhaust temperature sensor fault; F6: Pipe
temperature sensor fault (for outdoor heat exchanger); Fd: Air intake temperature sensor fault; FE: Upper
temperature sensor fault of the water tank; FL: Lower temperature sensor fault of the water tank). The
troubleshooting method is shown in the flowchart below.
Possible cause:
(1) Incorrect connection of temperature sensor; (2) Temperature sensor fault; (3) Mainboard fault
Troubleshooting: