Table of Contents
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No.
Name
1
Power Supply
2
S
3
4-WAY
4
HEAT1
5
HEAT2
6
AC-FAN
7
TESTPORT
8
TP T4 T3
9
DC-FAN
10
PMV
11
FAN_IPM
W
12
V
U
13
COMP_IPM
14
BR1
15
CN4
Note: This section is for reference only. Please take practicality as standard.
CN#
CN3
Earth: connect to Ground
CN1
N_in: connect to N-line (100-130V AC input)
CN2
L_in: connect to L-line (100-130V AC input)
CN16
S: connect to indoor unit communication
CN60
connect to 4 way valve, 100-130V AC when is ON.
CN17
connect to compressor heater, 100-130V AC when is ON
CN15
connect to chassis heater, 100-130V AC when is ON
CN25
connect to AC fan
CN6
used for testing
connect to pipe temp. sensor T3, ambient temp. sensor T4, exhaust
CN21
temp. sensor TP
CN7
connect to DC fan
CN31
connect to Electric Expansion Valve
IPM 501
IPM for DC fan
CN28
connect to compressor
CN29
0V AC (standby)
CN30
10-230V AC (running)
IPM 1
IPM for compressor
BR1
Bridge
CN4_2
connect to reactor
CN4_3
Specifications
Meaning
17
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Troubleshooting
