Troubleshooting; Reset Factory Setting - Gree UML600H/A-MP Service Manual

GREE

1.5.6 Reset Factory Setting

(1) Reset defaulted factory setting 1 (clear all settings):
Long press "SW1 + SW4" button for over 10s in the main module, the nixie tube will display "oC" for
3s, the main board will remove all settings, including IP address of indoor and outdoor unit.
(2) Reset defaulted setting 2 (clear all settings other than project debugging status):
Long press "SW2 + SW4" for over 10s in the main module, the nixie tube will display "oC" for 5s, the
main board will remove all settints, including IP address of indoor and outdoor unit, but completion label
for project debugging and the memory of indoor and outdoor unit quantity shall be kept.
(3) Reset defaulted setting 3 (clear function setting of outdoor unit only):
Long press "SW3 + SW4" for over 10s in the main module, the nixie tube will display "oC" for 7s,
then clear all function settings of the system, but project code of indoor and outsoor unit, the memory of
indoor and outdoor unit quantity and completion label for project debugging shall be kept.

2 Troubleshooting

Display
Content
code
Malfunction of
L0
indoor unit
Indoor fan
L1
protection
L2 E-heater protection
Water overflow
L3
protection
Power supply
L4 of wired controller is
faulted
Freeze prevention
L5
protection
L6 Mode shock
L7 No main indoor unit
Insufficient power
L8
supply
db
Display
Content
code
Malfunction of
E0
outdoor unit
Low pressure
E3
protection
Poor main board of
F0
outdoor unit
Malfunction of
discharge
F5
temperature sensor
for compressor 1
Air-mixing protection
J7
for 4-way valve
Display
Content
code
Wrong number of indoor unit
L9
for one-to-more indoor unit
Wrong series for
LA
one-to-more indoor unit
Alarming due to bad air
LH
quality
The indoor unit model can't
LC match with outdoor unit
model
d1 Poor indoor PCB
Malfunction of ambient
d3
temperature sensor
Malfunction of entry tube
d4
temperature sensor
Malfunction of exit tube
d6
temperature sensor
Malfunction of humidity
d7
sensor
Special code: engineering debugging code
Display
Content
code
E1 High pressure protection
Discharge high temperature
E4
protection for compressor
Malfunction of high pressure
F1
sensor
J0 Other module protection
High pressure ration
J8
protection of system
82
Duct type Ducted Type Split Air-Conditioner Units
Display
code
d8
d9
dA
dH
dC
dL
dE
C0 Communication malfunction
AJ
Display
code
E2
EC
F3
J1
J9
Content
Malfunction of water
temperature sensor
Malfunction of jumper cap
Abnormal address for
indoor unit
Abnormal PCB for wired
controller
Abnormal code-dialing
setting of capacity
Malfunction of air exhause
temperature sensor
Malfunction of indoor C0
2
sensor
Clean alarming for filter
Content
Low-temperature
protection for dicharge
Loose protection for
discharge temperature
sensor for compressor 1
Malfunction of low
pressure sensor
Overcurrent protection for
compressor 1
Low pressure ratio
protection of system