MCAC-2008-11 Air-cooled Modular Chiller
56
T
3B
: Condenser B tube Temperature sensor (failure code E6, protection code P7).
T
3A
: Condenser A tube Temperature sensor (failure code E5, protection code P6).
z T4
If any one system needs to start the outdoor fan, the fan will be started by the unit electric controller. The
fan has two speed levels: high and low which all depends on the T4 Temperature.
z T3B、T3A
When unit electric controller detects the Temperature of T
3B
or T
3A
are higher than 65 , the corresponding ℃
system will stop, then restart after the Temperature is lower than 60 or less. Meanwhile the other system ℃
keeps running without any influence.
z T4、T3B、T3A
The alarm will work if the voltage detected by the Temperature sensor is less than 0.05V or more than 4.95V.
z If main unit sensor of fails: all units will stop.
z If auxiliary unit sensor fails: this unit will stop while the others keep running.
4——System A compressor discharge gas Temperature sensor (failure code E8, protection code P8) is only
available for main unit.
5——Outlet water Temperature sensor of plate heat exchanger (failure code E4).
Capacity output will adjust according to the outlet water Temperature of the plate heat exchanger both in
cooling and heating modes.
(Auxiliary unit) constantly adjusting range: ON and OFF;
(Main unit) digitally adjusting range:
z Cooling mode: OFF, 30%, 40%, 50%, 60%, 70%, 80%, 90% and 100%.
z Heating mode: OFF, 30%, 40%, 50%, 60%, 70%, 80%, 90% and 100%.
6——Total outlet water Temperature sensor (failure code E3), just valid for main unit.
Adjust the capacity output according to the outlet water Temperature of the plate heat exchanger both in
cooling and heating modes
Adjusting range: OFF, 40%, 60%, 80%, and 100%.
7——CHECK. It can be achieved by CHECK to observe the running condition of the outdoor systems. The
corresponding data will be shown as follows:
A
s
y
s
t
e
m
r
u
n
n
i
n
g
c
u
r
r
e
n
t
B
c
o
m
p
r
e
s
s
o
r
c
a
p
a
c
i
t
y
R
u
n
n
i
n
g
m
o
d
e
l
N
o
r
m
a
l
d
i
s
p
l
a
y
C
o
n
d
e
n
s
e
r
A
T
e
m
p
.
O
n
l
i
n
e
m
o
d
u
l
e
s
A
m
b
i
e
n
t
T
e
m
p
.
E
x
v
A
l
i
f
t
E
x
v
B
l
i
f
t
C
o
n
d
e
n
s
e
r
B
8——DIGIT Digital compressor selecting switch.
“00” presents selecting digital compressor (as the main unit.)
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