Troubleshooting Guide

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