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[36] protection of oil temperature too low
if Toil is fixed well and
if its characteristic is correct
in cooling mode, check
if electronic expansion valve
of indoor unit which is not
running does not
close fully
in heating mode, check
if terminal of LEVb is
fixed well, if it leaks
in heating mode, check
terminals of LEVb, LEV A1,
LEV A2 are connected
respectively
check if refrigerant is too
much
[37-0, 37-1, 37-2] lack of phase of 3N power suppl y or wrong phase sequence
37-0 failure
37-1 failure
37-2 failure
no
yes
yes
no
yes
no
no
yes
yes
yes
no
yes
no
yes
fix again or replace the sensor
check indoor electronic
expansion valve
check LEVb
re-connect the terminals
recharge refrigerant
check if S-phase is electrified
check if T-phase is electrified
interconvert S-phase and T-phase
157
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