9. Wiring Diagrams
L
N
T1
T4
L
N
N-1
N-2
DC_FAN A
EXHUAST FAN
DC_FAN B
SUPPLY FAN
CN24 CN27
RA
E N C 1
5
3
2
1
4
ENC1
Capacity
setting
0
6
7
200
300
400
500
800
1000
1500
2000
SW1-1
COD
E
NAME
Outdoor temp.Sensor
POWER IN
220Vac 50Hz
Red
+
-~
~
BR1
Black
CN13
CN13
CN3
CN3
DC_FAN
DC_
F
AN
Module A
Module B
FM
FM
DC_FAN A
EXHUAST FAN
DC_FAN B
SUPPLY FAN
Bypass
damper
motor
CN19
Black
Red
Y/G
Blue
Xt1
27B Wired
controller
+
~
-
~
BR2
MOV
681
Blue
Brown
White
Red
Red
RB
RC
Red
R1230
R1510
PGND
AC_2
AC_1
P
Black
Red
Blue
Blue
CN8
P Q E
Show on
Tim
e
entralized controller
Unit is ON
Unit is OFF
Indoor temperature
sensor error
Outdoor temperature
sensor error
EEPROM error
DC fan motor error
Explanation
○
●
★
★
★
★
★
★
/ /
/
/
2 2
E2
4
E5(new protocol)
EF(old protocol)
6 6
E7
8 8
E6
10 10
OFF LINE
Without address
ommunication error
12
12
h ODU
E1
NOTE:
●
:Light ;
○
:Extinguish ;
★
:Quick flash
Operation
Flash
lam p
X Y E
CO2 Sensor
CN9
CN32 CN33
CN7
CN31 CN16
X1X2
CN26
CN21
PRO
S
W
1
S
W
2
CN14
CN15 CN20
CN10
CN34
SW1-2
SW2-1
SW2-2
SW2-3
ON
OFF
ON
OFF
ON
OFF
ON
ON
OFF
OFF
★
★
★
14
16
18
E9
EU
FC
error with sensor board
error with CO2 sensor
wire controller
communication failure
CN8
CN9
CN32
CN33
-
D1D2E
CN7
CN3
CN4
Indoor temp. Sensor
CN21
-
HRV centralized control
HRV single unit operation
With PRO
Without PRO
Positive Pressure
Negative Pressure
SW2-2
Balance Pressure
Ip address Conflict
Ed Outdoor unit failure
1 2
ON
1 2
ON
3
1 2
ON
3
1 2
ON
3
1 3
ON
2
1 2
ON
3
1 2
ON
3
1 2
ON
1 2
ON
1 2
ON
Low static pressure
Hige static pressure
1 2
ON
3
1 2
ON
* Reserved
1-2
1-3
reserved
Dry contact
(Out put)
Dry contact
(In put)
CN31
CN16
CN26
CN14
CN15
CN20
Remote ON/OFF
Force to exhaust air mode
Signal for inlet air Pre-heat
Alarm
Reserved
Max voltage: 220 VAC (consistent with power
supply) / Max current: 1A
CN16 Force expulsion air mode - closed contact: function active (this input has a
higher priority than the setting given by dip-switch SW2-2 / 3);
CN26 Remote On / Off - closed contact: unit forced off / open contact: normal
management;
CN15 Alarm - contact closed: alarm active / contact open: no alarm
CN20 Signal for inlet air preheating - contact closed: function active / contact open:
function not active
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