13
installation & owner’s manual
Detail information
5.6 Detail description for parts in fig. 5-5
Detection of current of the compressor B (protection code P5)
T4: outdoor ambient temperature sensor (fault code E7)
T3B: pipe temperature sensor of the condenser B (fault code E6 and protection code P7)
T3A: pipe temperature sensor of the condenser A (fault code E5 and protection code P6)
1) T4: if there is one system that requires starting outdoor fans, the fans are started through electric control of the
unit. Outdoor fans set high wind, low wind two respectively, and control the unit through T4.
2) T3B and T3A: when the electric control of the modular unit detects the temperature of the outdoor pipe T3A or
T3B of the system exceeds the protective temperature 65
ć
, the corresponding system will be shut down. And it
will be re-started up, after the temperature drops below the recovery temperature 60
ć
. Another system will be not
affected.
3) T4, T3B and T3A: when the temperature sensor is detected to suffer open circuit or short circuit, fault alarm will
occur.
● When the main unit suffer fault of temperature sensor: the main unit and subordinate units will be shut down.
● When the subordinate unit suffer fault of temperature sensor: the unit will be shut down, but other subordinate
units will not be affected.
Unit outlet water temperature sensor (fault code E4)
Under cooling mode and heating mode, conduct adjustment according to the magnitude of unit outlet water
temperature.
Total outlet water temperature sensor (fault code E3)
Only the main unit is valid, and the subordinate units are invalid.
Under refrigerating mode and heating mode, conduct adjustment according to the magnitude of total outlet
watertemperature. Adjustment range: shut-down, 40%, 60%, 80% and 100%.
No.
Table 5-2
Detection of current of the compressor A (protection code P4)
Current is not detected within the initial 5 seconds after the compressor is started up. When the current of
the compressor is detected to exceed protective value set (18A), it will be shut down and re-started after 3
min.
syetem A digital compressor exhaust temperature sensor(fault code E8, protection codeP8),Only the digital
modular is valid, and the constant speed modular are invalid.
Spot check. The operating status of outdoor system can be observed through spot check, and specific display
contents are as shown in the following figure:
Normal display
Operating mode Operating capability of the compressor B Number of online units Outdoor ambient temp. Temp. of the condenser A
Plate heat exchanger’s frost-proof temp Unit outlet water temp Unit inlet-water tempe Temp. of the condenser B
● Display contents of “operating mode”: 1. cooling; 2. heating; 4. pump; 8. Stand-by
● Display contents of “number of online units”: the main unit can display the number of online units, and the
subordinate unit displays 0.
Selection code of the compressor
The diagram denotes
selection of digital
compressor
The diagram denotes
selection of constant
speed compressor
EEV opening A EEV opening B Operating current of system A Operating current of system B
13
installation & owner’s manual
Detail information
5.6 Detail description for parts in fig. 5-5
Detection of current of the compressor B (protection code P5)
T4: outdoor ambient temperature sensor (fault code E7)
T3B: pipe temperature sensor of the condenser B (fault code E6 and protection code P7)
T3A: pipe temperature sensor of the condenser A (fault code E5 and protection code P6)
1) T4: if there is one system that requires starting outdoor fans, the fans are started through electric control of the
unit. Outdoor fans set high wind, low wind two respectively, and control the unit through T4.
2) T3B and T3A: when the electric control of the modular unit detects the temperature of the outdoor pipe T3A or
T3B of the system exceeds the protective temperature 65
ć
, the corresponding system will be shut down. And it
will be re-started up, after the temperature drops below the recovery temperature 60
ć
. Another system will be not
affected.
3) T4, T3B and T3A: when the temperature sensor is detected to suffer open circuit or short circuit, fault alarm will
occur.
● When the main unit suffer fault of temperature sensor: the main unit and subordinate units will be shut down.
● When the subordinate unit suffer fault of temperature sensor: the unit will be shut down, but other subordinate
units will not be affected.
Uni
Uni
Uni
Uni
U
n
ni
n
t o
o
t o
t o
t o
t o
t o
o
o
utl
u
u
u
u
u
et water temperature sensor (fault code E4)
Und
Und
Und
Und
Und
Und
n
nd
d
er
co
co
co
coo
co
co
co
co
co
ling m
m
m
m
m
ode
od
d
od
an
n
n
n
n
d h
d
d
eating
n
ng
ng
mo
o
o
o
o
o
de
de
de,
co
co
co
ndu
ndu
u
ndu
ct adj
a
adj
a
adj
ust
ust
ust
men
me
e
me
e
t a
a
cco
cco
cco
cco
cco
cco
o
o
rding
g
g
g
g
to
to
o
to
o
the ma
ma
ma
a
ma
ma
m
m
gni
gni
gni
g
gni
gni
gni
n
tude o
o
o
o
o
f u
f u
u
f u
u
f u
u
nit
t
t
t
t
t
t
ou
ou
ou
tle
tle
tle
t w
t w
t w
ate
ate
te
e
e
ate
r
r
r
r
r
temper
er
er
er
er
er
r
atu
atu
atu
atu
atu
atu
atu
atu
re.
Tot
T
T
T
T
T
T
al out
ut
ut
ut
ut
ut
ut
t
let wate
e
er t
t
emp
p
p
pera
a
ature
e
e
e
e
e
e
e
sen
n
n
nsor (fa
ault
t
t
t code E
E
E3)
)
)
)
Onl
Onl
Onl
Onl
Onl
y t
y t
y t
y t
y t
y t
y
h
h
h
he
h
h
h
main unit is valid, and the subordinate units are invalid.
Und
Und
Und
Und
Und
Un
Und
Un
Und
er refrigerating mode and heating mode, conduct adjustmen
men
me
men
me
me
me
e
me
t acco
co
co
co
co
co
co
co
co
rdi
r
r
r
r
r
r
r
r
ng to the
e
e
e
e
e
e
e
magnitude of total outl
u
ut
u
u
ut
u
ut
ut
et
e
e
e
e
e
e
e
e
watertemperature. Adjustment range: shut-down, 40%, 60%, 80%
0%
0%
0%
0%
0%
%
0%
%
an
an
an
an
a
a
a
a
d 1
d 1
d
d
d
d
d
d
d
00%
00%
00%
0%
%
%
%
.
No.
Table 5-2
Detection of current of the compressor A (protection code P4)
Current is not detected within the initial 5 seconds after the compressor is started up. When the current of
the compressor is detected to exceed protective value set (18A), it will be shut down and re-started after 3
min.
syetem A digital compressor exhaust temperature sensor(fault code E8, protection codeP8),Only the digital
modular is valid, and the constant speed modular are invalid.
Spot check. The operating status of outdoor system can be observed through spot check, and specific display
contents are as shown in the following figure:
Normal display
Operating mode Operating capability of the compressor B Number of online units Outdoor ambient temp. Temp. of the condenser A
Plate heat exchanger’s frost-proof temp Unit outlet water temp Unit inlet-water tempe Temp. of the condenser B
● Display contents of “operating mode”: 1. cooling; 2. heating; 4. pump; 8. Stand-by
● Display contents of “number of online units”: the main unit can display the number of online units, and the
subordinate unit displays 0.
Selection code of the compressor
The diagram denotes
selection of digital
compressor
The diagram denotes
selection of constant
speed compressor
EEV opening A EEV opening B Operating current of system A Operating current of system B
