Sinclair S therm Series Service Manual page 153

Compressor Current Protection (Code:"P5"); Compressor Motor Desynchronizing (Code:"H7"); IPM
◆
Protection (Code:"H5"); Phase Loss (Code:"LD")
Charging Circuit Error(Code:"PU")
◆
the driver board AP4
"Com. over-curr.",
"Desynchronize",
"IPM defective" or
"Phase loss" is
Displayed on the
wired controller
P5、H7、H5 or LD
is displayed in the
mainboard 88
indicating lamp
Is the
compressor
wire phase
sequence
right?
YES
Is the
compressor
wire terminals
tightened?
NO
Replace the
mainboard.
Does it work
normally?
NO
Replace
the compressor
Replace
Adjust the
NO
compressor
phase sequence
Tighten the
YES
compressor
wire terminals
YES
Work Normally
"Charge circuit" is
displayed on the
wired controller
PU is displayed in
the mainboard 88
indicating lamp
Is the PFC wire
tightened or is the
sequence right?
Work Normally
149
Tighten the PFC wire
or adjust the sequence