ERS ECH Series - Page 81

6
ENC3: Address dial switch
-
7 DSP1: Digital display
-
8
FUS1:Fuse
9
CN43: Power input
10 CN12_1,CN12_2: Solenoid valve (SV4) drive ports
0-
11 IC25: Main control chip
-
12
CN64: Debug port
13 CN16: Four-way valve drive port
0-
14 CN5,CN5_1: Water side heat exchanger heater
connecon
s
0-
15 CN4,CN4_1: Water flow switch heater
connecon
0-
16
CN3,CN3_1: Compressor
crankcase heater
connecons
0-
17 CN49: Reserved communicaon port
2.5-
18 CN52,CN53: Fan inverter module communicaon
port
s
2.5-
19 CN50,CN51: Compressor inverter module communicaon port
s
2.5-
20
CN55: EXV drive port
21 CN60,CN71: Wired controller communicaon ports
2.5-
22
CN24: Outdoor ambient temperature sensor and
air side heat exchanger
refrigerant outlet
temperature sensor connecons
0-
23
CN69: Water side heat exchanger
an
-
freezing temperature sensor
1, air side heat
exchanger refrigerant total outlet temperature sensor, discharge temperature
sensor 2 and discharge temperature sensor 1 connecons
0-
24
CN31: Air sucon temperature sensor
, water side heat exchanger
an
-
freezing
temperature sensor 2, water side heat exchanger water outlet temperature
sensor, water side heat exchanger water inlet temperature sensor and combined
water outlet temperature sensor connecons
0-
25 CN40: Pressure sensor connecon
0-
26
CN41,CN42: I
nverter module temperature
sensor
1 and I
nverter module
temperature sensor 2 connecons
0-
27
CN62: AC indicator A and AC indicator B
connecons
0-
28
CN65:Low pressure switch connecon
29
CN47:High pressure switch and discharge temperature switch (es) connecons
30 CN58,CN59: AC filter board communicaon ports
31 CN44:Water flow switch,
addional
cont
rol and Cool/heat
connecons.
32
IC10: EEPROM
-
33
CN21: Remote alarm connecon
34
CN19_N: Electric a
uxiliary heater
N line connecon
35
CN19_L: Electric auxiliary heater
N
line connecon
36
CN2: Pump 2 connecon
26
V.2