GREE ELECTRIC GUHD09NK3CO Service Manual page 105

Trouble Trouble
Code Name Trouble Signal
Malfunction
of Indoor
F0 Environment
Sensor at Return
air Vent
Evaporator
F1 Temp. Sensor
evaporator sensor
Malfunction
Condenser
F2 Temp. Sensor
condenser sensor
Malfunction
Outdoor
Environment
F3
Sensor
Malfunction
Malfunction of
F4 Exhaust Temp.
Sensor
Malfunction
Of Indoor
F5 Environment Wired controller
Sensor at Wire
Controller
All of The
Terminal Air
FF
Valve Colsed
(not failure)
Wire Controller
Invalid
CC wire controller
(not failure)
Keys Locked
EE wire controller keys on wire controller are locked (not failure)
(not failure)
Origin of
If the indoor sensor is detected of open circuit or short circuit for 5 seconds
successively, the indoor room temperature will forcibly set to 24
Indoor room the system will not perform any treatment, only the indicator will blink or display
sensor the fault code. The system can automatically resume after the failure is eliminated.
Under fan mode, only the fault will be displayed, but the indoor unit will run
normally. The fault disappears after it is eliminated.
If the evaporator sensor is detected of open circuit or short circuit for 5 seconds
successively: When under cooling and dry mode, the system will be stopped. When
under heating mode, all of the loads except the 4-way valve will be stopped, while
Outdoor
the indicator will blink or display the fault code F1. After the fault is eliminated, the
system can automatically resume to operation and clear the fault display. Under fan
mode, only the fault will be displayed, and the indoor unit will run normally. The
fault disappears after it is eliminated.
If the condenser sensor is detected of open circuit or short circuit for 5 seconds
successively: When under cooling and dry mode, the system will be stopped. When
under heating mode, all of the loads except the 4-way valve will be stopped, while
the indicator will blink or display the fault code F2. After the fault is eliminated, the
Outdoor
system can automatically resume to operation and clear the fault display. Under fan
mode, only the fault will be displayed, and the indoor unit will run normally. The
fault disappears after it is eliminated.
For cooling-only unit, the other units except the duct type will not detect the
condenser sensor fault.
If the outdoor environment sensor is detected of open circuit or short circuit for
5 seconds successively: When under cooling and dry mode, the system will be
Outdoor stopped. When under heating mode, all of the loads except the 4-way valve will be
environment stopped, while the indicator will blink or display the fault code F3. After the fault
sensor is eliminated, the system can automatically resume to operation and clear the fault
display. Under fan mode, only the fault will be displayed, and the indoor unit will
run normally. The fault disappears after it is eliminated.
If the outdoor temperature sensor is detected of open circuit for 5 seconds
successively after the compressor is started: When under cooling and dry mode,
all the loads will be stopped. When under heating mode, all of the loads except
the 4-way valve will be stopped, while the indicator will blink or display the fault
code F4 and the buzzer will alarm. After the fault is eliminated, the system can
Exhaust
automatically resume to operation and clear the fault code.
temperature
sensor
If the outdoor temperature sensor is detected of short circuit: When under cooling
and dry mode, all the loads will be stopped. When under heating mode, all of the
loads except the 4-way valve will be stopped, while the indicator will blink or
display the fault code F4 and the buzzer will alarm. After the fault is eliminated, the
system can automatically resume to operation and clear the fault code.
If the wired controller is detected of open circuit or short circuit for 5 seconds
successively, the indoor room temperature will forcibly set to 24
the system will not perform any treatment, only the indicator will blink or display
the fault code. The system can automatically resume to operation after the failure
is eliminated. Under fan mode, only the fault will be displayed, but the indoor unit
will run normally. The fault disappears after it is eliminated.
System The air valve on end will be fully closed.
the units is remotely monitored or controlled by centralized controller and the wire
controller's functions are invalidated (not failure)
Control Description
U-Match Series DC
Inverter Service Manual
°C
. In this case,
°C
. In this case,
102