Cooper & Hunter FG20/C-M, Service Manual

Page: 49 / 91

DUCT TYPE SPLIT AIR CONDITIONER MAINTENANCE
46
compressor has been detected in 3 times in 30 min, turn
off all loads (except for 4-way valve) and shield all
buttons and remote control signal except for ON/OFF
button. Then LED will blink and display the
corresponding error code E5 and the complete unit cannot
be automatically recovered After turning off the unit by
press ON/OFF button, if the error disappears, clear the
error code and turn off the LED.
E6 Communication error Terminal interface
After energization, if the mainboard of the indoor unit
does not receive signal, it is the communication error. In
that case, the compressor and the outdoor fan will stop. If
the indoor unit does not receive the signal of the outdoor
unit, the auxiliary e-heater and the indoor fan will stop. If
the wired controller does not receive the signal of the
outdoor unit, E6 will be displayed. The machine will not
work.
E8 Indoor fan protection
Motor switch or
thermal relay
After startup of the indoor fan, if it is detected that
the overload signal of the indoor fan lasts for 3s, all the load
will be cut off. E8 will be displayed and the buzzer will
beep.
F0
Indoor ambient temp.
sensor error
Indoor ambient
temp. sensor
If detect that AD value exceeds 250(short circuit with
corresponding temp. 160 ) or less than 5 (open circuit
℃
with corresponding temp about -45 ), it is believed that ℃
there is error of temp. sensor.
F1
Temp. sensor error of
indoor evaporator
Temp. sensor of
indoor evaporator
If detect that AD value exceeds 250(short circuit with
corresponding temp. 160 ) or less than 5 (open circuit ℃
with corresponding temp about-45 ), it is believed that
℃
there is error of temp. sensor.
F2
Tube sensor error
for outdoor condenser
Tube sensor for
outdoor condenser
If detect that AD value exceeds 250(short circuit with
corresponding temp. 160 ) or less than 5 (open circuit
℃
with corresponding temp about -45 ), it is believed that ℃
there is error of temp. sensor.
F3
Outdoor ambient
temp. sensor error
Outdoor ambient
temp. sensor
If detect that AD value exceeds 250(short circuit with
corresponding temp. 160 ) or less than 5 (open circuit ℃
with corresponding temp about -45 ), it is believed that
℃
there is error of temp. sensor.
F4
Discharge temp.
sensor error
Discharge temp.
sensor
If detect that AD value exceeds 250(short circuit with
corresponding temp. 160 ) or less than 5 (open circuit
℃
with corresponding temp -45 ), it is believed that there ℃
is error of temp. sensor.