yes
no
replace reversing valve
does reversing valve work ok?
check the resistance of pipe
sensor,whether at normal
range)
refer to other fault solution
no
check system whether
lack R22
yes
no
replace pipe sensor
yes
short the XT port,see whether defrost
replace PCB
no
yes
yes
no
does the dip switch at proper
position?(refer to wire diagram)
5.3 Troubleshooting:
does the unit work properly?
does there show any default
change the dip switch to right position
code ?
5.6
3
3
3
and 37k for
range?(13K for 35.6 and 37k for
set pipe temp to about
3
2 and use a ring to
ally between this
℉
℉
-4 , norm
℉
39
Central Air Conditi
oning
Model: Heat Pump,
HR13-D1
