Part 3
[34] discharging temp. (TD) protection acts
if outdoor gas/liquid stop
valves open fully
no
yes
open all stop valves
if outdoor EEV is
normal(the connector, wires, coil,
valve body, outdoor PCB)
no
no
no
yes
yes
yes
modify outdoor EEV
replace TD sensor
if TD sensor
resistor/characteristic are normal
if wire spec is right
match the right wire
lack of refrigerant, clogged,
or pipe bended
confirm if there is clogged and
bended pipe, recharge the
proper refrigerant
yes
[28/29] high/low pressure sensor circuit
if pressure sensor connector
and wiring are correct
no
yes
if pressure sensor
characteristic is normal
check outdoor connecting board,
if faulty, replace it
no
yes
modify connector and wires
replace pressure sensor
- 126 -
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