Troubleshooting Guide

Table Of Contents
No. Name CN# Meaning
1 Power Supply
CN6 Earth: connect to Ground
CN7 N_in: connect to N-line (208-230V AC input)
CN8 L_in: connect to L-line (208-230V AC input)
2 S CN2 S: connect to indoor unit communication
3 4-WAY CN60 connect to 4 way valve, 208-230V AC when is ON.
4 AC-FAN CN5 connect to AC fan
5 HEAT2 CN19 connect to chassis heater, 208-230V AC when is ON
6 TP T4 T3 CN17
connect to pipe temp. sensor T3, ambient temp. sensor T4, exhaust
temp. sensor TP
7 PMV CN18 connect to Electric Expansion Valve
8 HEAT1 CN16 connect to compressor heater, 208-230V AC when is ON
9 DC-FAN CN414 connect to DC fan
10 TESTPORT CN23 used for testing
11 FAN_IPM IPM501 IPM for DC fan
12 COMP_IPM IPM1 IPM for compressor
13
U CN27 connect to compressor
V CN28 0V AC (standby)
W CN29 200-300V AC (running)
14 EE_PORT CN505 EEPROM programer port
Specifications 21
Note: This section is for reference only. Please take practicality as standard.