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Fault
Code
Fault Contents
Remark
H4
Display
P6
protection for
3
times
within
30
minules
H5
Display
P2
Fotection
for
3
times
within
30
minutes
z0{itrute
break
at
fi6t
or
2-minute break later
H6
Display
P4
protection for
3 times
within
I
00
miniles
Restore
when powenng oo
H7
The
decrease
in number
ofitrdoot
uili1
Indoor units
de
lost for mole
the
3
minutes. It cm't be
restored
until nmrber of indoor units
arc
restoted
H9
Display
P9
protoction tbr
2 times
within
I
0
minutes
Restore
when
powoing
on
H10
Display
P3
protection for
3
times
within
60 mitrutes
Restore
whd
powering o0
H11
Display
PIJ
J'rotection
for 2
limes
within l0
rninutes
Restorc
when
powering on
P1
Hi
gh
piessure
protection
P2
Low
presswe
protection
Display H5 after
P2
protection for
3
times
wilhin
30
minttes
P3
Vanous frequency
over-crfr€ntproleclion
P4
Exhaust overheating
protection
Display H6 for
3
times
within
I
00
hinutes
P5
T3 high tcmpcralurc protection
P6
Module protection
Display H4 after
P6
protection for
3
times
within
30
minutes
P9
DC
far
fault
Display H9 after
P9
protection for
2
times
within
10
minutes
Pi0
Anti-t'?hoon
prolection
P11
T2 high tenDerature protection
Pt2
Fault of the heating
fm
continuously working for
5
mintcs
in
area
A
P13
Cwent
dctcction
cror
protcctton
12. 5.
14,
l6dd
l8kw
de
eflective.
8
and
l0kw
have
no
such
faults
LO
DC
comprcssor
module fault
L1
DC
bus
low voltage protection
L2
DC
bu
high voltage prctection
L4
MCE fault /
sync
/
closed
loop
L5
Zqo
speed
protection
L7
Phasc sequenoe
eror
prolechon
L8
Protection
when the speed chatrge
oftuo
successive
peiods
exceeds
1sHz
L9
Protection ofspeed
chdge (> l5Hz)
for
lhe previous time
and the next
lime
6
Tlial
Run
6.1
Inspection
and
confirmation before debugging
1)
Check and make sure the
refrigerating pipeline
and
comunication
line comecting
with
the
refrigerating system.
Otherwise,
sorne
running faults
-occur.
.
2)
The power sripply
voltage
is
within
the'rated voltage
of,t10%.
3)
Check
and
make
sure
the
power supply line
and
the
conhol line
are
conectly
connected.
4)
Before power-on, make sule there
is
no short
circuit.
5)
Check
ifall
units have passed 24-hour nitrogen pressure-maintaining
(40kgf/cm'))
test.
6)
Make
sure
the debugged system is
fully
vacuumized, dried and
filled
with
the
refrigerant
as
specified.
6.2
Preparation
before debugging
l)
Calculate the
refilling
volume ofrefrigerant for
each set
ofunits
according to the
length
ofon-site liquid
2)
Prepare
lhe required
refrigerant.
3)
Prepare
the system plan, system
piping
diagram and
control wiring
diagram.
4)
Mark
the
set address
codes on the system plan.
5)
Tum
on the
power supply switch
of
the outdoor
unit in
advance, and
make
sure
it
indoor
and
outdoor units
ue
comected
with
ths
same
pipe
Fig.
6-1
Filling
of Names
of Connecting
Systems
is
power-on
for
more than
12
hours,
so
that
the heater heats the
compressor
o1l.
6)
Fully
open
air pipe
check
valve,
liquid
pipe
check
valve
md oil
balance
valve
of
the outdoor
urit.
If
they
me
fully
opened, the
machine may
be
damaged.
7)
Check
ifthe
power supply
phase sequence
ofthe
outdoor
unit
is
conect.
8)
Check
if
all dialing
switches
of
the indoor and outdoor units
are set
according to the
technical
requirements
of
the product.
6.3 Filling
of
names
of connecting
systems
Room
nme
Example: 2nd floor, firet
Remark: -2F-1A
13
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