Maintenance; Trouble Table - Gree FGR20/BNa-M Service Manual

MAINTENANCE

1 TROUBLE TABLE

Trouble
Trouble Name
Code
Compressor High
E1
Pressure Protection
Compressor low
E3
pressure protection
Compressor
E4 discharge temp.
protection
Overloading
E5 Protection of
Compressor
Communication
E6
malfunction
E9 Indoor fan protection
Indoor ambient
F0
temp. sensor error
Temp. sensor error
F1
of indoor evaporator
Tube sensor
F2 error for outdoor
condensator
Outdoor ambient
F3
temp. sensor error
Discharge temp.
F4
sensor error
Origin of
Trouble Signal
When high pressure protection has been detected in continuously 3 seconds, shut off
all loadings and shield all buttons and remote control signals. LED blinks and displays
High Pressure
E1. The unit cannot recover automatically. Turn off the unit by pressing ON/OFF,
Switch
clearing "E1"and turning off the LED.
After 3min running of compressor, detect signal from low pressure switch. If detect that
low pressure switch is cut off in continuously 30s, the complete unit will stop and display
Low pressure "E3"while LED blinks. 3min later, if the error has cleared, the complete unit resume
switch running; If the low pressure switch protection has been detected for 3 times during
30min, the LED will blinks and displays "E3". The unit cannot recover automatically
which requires pressing ON/OFF, and then clear error code and turn off LED.
After the running of compressor, if detect that discharge temp. is higher that 130 ℃
in continuously 30s, it is believed that there is high temp. protection of discharge
pipes of compressor. Turn off compressor, external fan and inner fan. LED blinks
and displays corresponding error code "E4". After 3min stop of compressor, if detect
that the discharge temp. is lower than 90℃ for continuously 5s, the compressor will
Compressor
resume running.
discharge temp.
Since the first error detected, if detect that there is 3 times of high temp. protection
sensor.
for compressor discharge pipes in 30min, turn off compressor, external fan and inner
fan. LED blinks and displays corresponding error code "E4". The unit cannot recover
automatically which requires pressing ON/OFF, and then clearing error code and
turning off LED.
If it is detected that overloading switch is cut off for continuously 3 seconds, it is
believed that compressor is in the condition of overloading protection. Turn off
compressor and external fan and the LED blinks and displays the corresponding error
code E5.After 3 min stop of compressor, if the error has disappeared, the compressor
will restart.
Overcurrent
From the first error detected, if overloading protection of compressor has been
Protector
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.
After energization, if outdoor unit continuously shows that there is not any feedback
from indoor unit's mainboard, communication malfunction occurs. In this case,
compressor will be stop and E6 will be displayed. After that, outdoor fan stops. If
heating, the 4 way valve will stop after the compressor stops for adequate time.
Terminal COM
If the indoor unit hasn't received information from outdoor unit for a period of time,
communication malfunction occurs. In this case, indoor unit stop (during heating,
E-heater stopped firstly and the indoor fan blows residual heat). If the display board
hasn't received information from indoor unit for a period of time, communication
malfunction occurs. In this case, malfunction code is displayed and the unit won't act.
After startup of indoor fan if overloading information of fan breaks for a period of time,
Fan's motor switch
or thermal relay all loads will stops and E9 will be displayed.
If detect that AD value exceeds 250(short circuit with corresponding temp. 160 ℃ )
Indoor ambient
or less than 5 (open circuit with corresponding temp about -45℃ ), it is believed that
temp. sensor
there is error of temp. sensor.
If detect that AD value exceeds 250(short circuit with corresponding temp. 160 ℃ )
Temp. sensor of
or less than 5 (open circuit with corresponding temp about-45℃ ), it is believed that
indoor evaporator
there is error of temp. sensor.
If detect that AD value exceeds 250(short circuit with corresponding temp. 160 ℃ )
Tube sensor
or less than 5 (open circuit with corresponding temp about -45℃ ), it is believed that
for outdoor
there is error of temp. sensor.
condensator
If detect that AD value exceeds 250(short circuit with corresponding temp. 160 ℃ )
Outdoor ambient
or less than 5 (open circuit with corresponding temp about -45℃ ), it is believed that
temp. sensor
there is error of temp. sensor.
If detect that AD value exceeds 250(short circuit with corresponding temp. 160℃ ) or
Discharge
less than 5 (open circuit with corresponding temp -45℃ ), it is believed that there is
temp. sensor
error of temp. sensor.
Duct Type Split Air Conditioner
Control Description
Service Manual
51