Gree Dettson LOMO 19 Installation Manual page 61

No. Malfunction Name
Indoor ambient
11 temperature sensor is
open/short circuited
Indoor evaporator
12 temperature sensor is
open/short circuited
Outdoor ambient
13 temperature sensor is
open/short circuited
Outdoor condenser
14 temperature sensor is
open/short circuited
Outdoor discharge
16 temperature sensor is
open/short circuited
Limit/decrease frequency
17
due to overload
Decrease frequency due
18
to overcurrent
Decrease frequency due
19
to high air discharge
Limit/decrease frequency
20
due to antifreezing
58
Display Method of
Indoor Unit
Dual-8 Code
Display
During cooling and drying operation, indoor
unit operates while other loads will stop; during
F1
heating operation, the complete unit will stop
operation.
AC stops operation once reaches the setting
temperature. Cooling, drying:
F2 internal fan motor stops operation while other
loads stop operation; heating: AC
stop operation
During cooling and drying operating, compressor
F3 stops while indoor fan operates; During heating
operation, the complete unit will stop operation
During cooling and drying operation, compressor
F4 stops while indoor fan will operate; During heating
operation, the complete unit will stop operation.
During cooling and drying operation, compressor
will sop after operating for about 3 mins, while
F5 indoor fan will operate;
During heating operation, the complete unit will
stop after operating for about 3 mins.
All loads operate normally, while operation
F6
frequency for compressor is decreased
All loads operate normally, while operation
F8
frequency for compressor is decreased
All loads operate normally, while operation
F9
frequency for compressor is decreased
All loads operate normally, while operation
FH
frequency for compressor is decreased
A/C status
1. Loosening or bad contact of indoor ambient
temp. sensor and mainboard terminal.
2. Components in mainboard fell down leads
short circuit.
3. Indoor ambient temp. sensor damaged.(check
with sensor resistance value chart)
4. Mainboard damaged.
1. Loosening or bad contact of Indoor
evaporator temp. sensor and mainboard terminal.
2. Components on the mainboard fall
down leads short circuit.
3. Indoor evaporator temp. sensor damaged.
(check temp. sensor value chart for testing)
4. Mainboard damaged.
Outdoor temperature sensor hasn't been
connected well or is damaged. Please check it by
referring to the resistance table for temperature
sensor)
Outdoor temperature sensor hasn't been
connected well or is damaged. Please check it by
referring to the resistance table for temperature
sensor)
1.Outdoor temperature sensor hasn't been
connected well or is damaged. Please check it by
referring to the resistance table for temperature
sensor)
2.The head of temperature sensor hasn't been
inserted into the copper tube
Refer to the malfunction analysis (overload, high
temperature resistant)
The input supply voltage is too low;
System pressure is too high and overload
Overload or temperature is too high;
Refrigerant is insufficient;
Malfunction of electric expansion valve (EKV)
Poor air-return in indoor unit or fan speed is too
low
Service Manual
Possible Causes
Installation and Maintenance