Haier H2SM Series Service Manual page 33

Abnormality Diagnosing
Trouble
Number
phenomenon
Not work with
1 remote
controller
Outdoor fan
2 motor
doesn't work
Indoor fan
3 motor
doesn't work
4 Not heating
Parts that may appear problems
Description
7805,transformer, piezo
Use the resistance, fuse,remote controller,
remote receiver. If it can be booted by
controller to using manual emergency switch,
boot that indicate the power cable and
machine wiring board are electriferous
and it remote controller or receiver isn't
doesn't well else check whether piezo
work resistance ,fuse and 7805 are
Optical SCR, indoor P.C. board.
Check the 2# and 4# terminal
Outdoor block of indoor unit, if it has 220V
fan motor voltage, wiring board is normal,
doesn't run then check whether the optical
when SCR is good, replace it if it has
cooling or flaw else check whether there are
heating something wrong with connecting
line outdoor fan motor capacitor
and coil assembly
Optical SCR indoor P.C. board
Check whether indoor fan motor
Indoor fan has 80-170V voltage if it has
motor wiring board is normal, then check
doesn't run whether the optical SCR is good,
when replace it if it has flaw else check
cooling or whether there are something
heating wrong with connecting line indoor
fan motor capacitor and coil
Indoor P.C. board , four-way valve
coil, body of four-way valve Check
the 2# and 3# terminal block of
indoor unit, if it has 220V voltage
Cooling but
when heating but no when cooling,
not heating
then P.C. board is abnormal; else
check whether four-way valve coil
and the body of four-way valve are
Air Conditioner
and the Cause
well
assembly
damaged
29
Edition:2006/1/10
Prepared parts Applicable
and tools machine
7805,transfor
mer, fuse,
piezo
invariable
resistance,
frequency
remote
split unit
controller,
receive,avome
ter
Optical SCR,
indoor P.C.
board ,
outdoor fan invariable
motor frequency
capacitor, split unit
outdoor fan
motor,avomet
er
Optical SCR
indoor P.C.
board , indoor
invariable
fan motor
frequency
capacitor,
split unit
indoor fan
motor,avomet
er
Indoor P.C.
board ,
four-way valve invariable
coil, body of frequency
four-way split unit
valve,
avometer