Heating Mode; Control Mode; Based Control - Gree GUD35W/NhA-T Service Manual

GREE

2.1.2 Heating Mode

Power on
Heating start
control
Satisfying open
Comp.condition
Comp. and
outdoor fan
run
Avoid cool
wind
indoor fan run

2.2 Control Mode

2.2.1 Based Control

2.2.1.1 Compressor Control
When cooling or heating mode is turned on, indoor fan will run for a while before the compressor starts. Under different modes,
the compressor can only be stopped after running for some time (special cases excluded). This is to protect the compressor from
frequent start or stop. Once the compressor is stopped, it must not be restarted right away. Please wait for a few minutes.
2.2.1.2 EXV Control
When the unit is first started, the electronic expansion valve will reset control. During the process, the expansion valve will
produce rattling sound. When cooling or heating mode is turned on, the valve will be open at a certain step before the compressor
starts.
N
Y
N
Oil return IN
condition are met
Y
Oil return
operation
Comp. and
outdoor fan
stop
N
Defrost IN
condition are met
Y
Defrosting
operation
10
U-Match 5 SERIES UNIT SERVICE MANUAL
N
Y
Temp of
indoor≤Set
temp
N
Y
Comp. stop
for 3 min
indoor fan run
for 1 min
Comp. and
outdoor fan
stop