Malfunction List; Malfunction List For The Idu - Gree FGR25Pd/DNa-X Service Manual

3
4
5
6
7
8
9
10
11
parameters
12
Communication
13
parameters
14 Drainage system
15 Others

2 Malfunction List

2.1 Malfunction list for the IDU

Display
Content
code
Malfunction of
L0
indoor unit
Indoor fan
L1
protection
L2 E-heater protection
Water overflow
L3
protection
Duct type split Air conditioner Inverter Series
Defrosting
temperature
System high
pressure
System low pressure
Opening angle of
thermal EXV
Compressor working
current
Compressor's IPM
temp
IDU ambient temp
Indoor heat
exchanger's inlet
temp
Indoor heat
IDU
exchanger's inlet
temp
Opening angle of
indoor EXV
Communication data
——
——
Display
code
Wrong number of indoor
L9 unit for one-to-more indoor
LA
one-to-more indoor unit
Alarming due to bad air
LH
The indoor unit model can't
LC match with outdoor unit
●In cooling mode, defrosting temp is 4~10 ℃
lower than system's high pressure value;
℃
●In heating mode, defrosting temp is about 2℃
different from system's low pressure value.
●In cooling mode, the normal high pressure value
is within 20℃~55℃. According to the change of
ambient temp and system's operating capacity,
the high pressure value will be 10℃~30℃ higher
than ambient temp. The higher ambient temp is,
the smaller temp difference is. If ambient temp is
℃
25~35℃ in cooling mode, system's high pressure
value will be within 44~53℃.
●In heating mode, if ambient temp is above -5℃,
system's high pressure value is within 40~52℃. If
ambient temp is low and many IDUs are turned
on, the high pressure will be lower.
●When ambient temp in cooling mode is 25~35℃,
the low pressure value is 0~8℃.
℃
●When ambient temp in heating mode is above
-5℃, the low pressure value is -15~8℃.
●In cooling
expansion valve remains 480PLS.
PLS
●In heating mode, the adjustable opening angle of
EXV is 60~480PLS.
When compressor works normally, the current is
A
no more than 23.0A.
When ambient temperature is below 35℃, IPM
temperature is lower than 70℃. Maximum
℃
temperature is 80℃.
——
℃
●According to ambient temp, for a same IDU in
℃ cooling mode, the inlet temp will be 1 ℃ ~7 ℃
lower than the outlet temp, and 4~9℃ higher than
the low pressure value.
℃ ●For a same IDU in heating mode, the inlet temp
will be 10℃~20℃ lower than the outlet temp.
●In cooling mode, the opening angle of indoor
EXV varies within 40~480PLS.
PLS
●In heating mode, the opening angle of indoor
EXV varies within 70~480PLS.
Number of IDUs detected by software is the same
—
with the actual number. No communication error.
Indoor unit can drain water out completely and
smoothly. Condensate pipe has no backward
— slope of water; Water of outdoor unit can be
drained completely through drain pipe. No water
drop from unit base.
Compressor and indoor/outdoor fan motor do not
—
have strange noise. Unit can operate normally.
Content
unit
Wrong series for
quality
model
83
mode, the thermal
Display
Content
code
Malfunction of water
d8
temperature sensor
d9 Malfunction of jumper cap
Abnormal address for
dA
indoor unit
Abnormal PCB for wired
dH
controller
electronic