Troubleshooting Guide

Table Of Contents
No. Name CN# Meaning
1 Power Supply
CN11 N_in: connect to N-line (208-230V AC input)
CN12 L_in: connect to L-line (208-230V AC input)
2
EEV-A CN16
connect to electric expansion valve
EEV-B CN13
EEV-C CN3
EEV-D CN15
EEV-E CN1
EEV-F CN17
EEV-G CN14
3 T3 T4 TP CN26
connect to pipe temp. sensor T3, ambient temp. sensor T4, exhaust
temp. sensor TP
4 H-PRO,L-RPO CN29
connect to high and low pressure swtich(pin1-pin2&pin3-pin4:5VDC
pulse wave)
5 OLP TEMP. SENSOR CN30 connect to compressor top temp. sensor (5VDC Pulse wave)
6 TESTPORT CN24 used for testing
7 COMPRESSOR
U connect to compressor
V 0V AC (standby)
W 10-200V AC (running)
8 DC-FAN CN32 connect to DC fan
9
S-E CN31
S: connect to indoor unit communication(pin1-pin2: 24VDC Pulse wave;
pin2-pin3: 208-230V AC input)
S-D CN5
S-C (mono) CN34
S-B CN2
S-A CN4
Specifications 23