Read Sharp GU-XC157 Service Manual online
32
Condition of
the indoor
and
outdoor
units
Illumination of r
ed operation lamp on the indoor unit
The yellow timer lamp is used for timing purposes: the lamp flas
hes five
times, goes out for five seconds, then r
esumes the flash cycle.
5 seconds OFF
Nor
mal
Indoor and outdoor units
are of
f
Indoor unit operating
Outdoor unit off
Outdoor
unit lamp
(LED 1)
flashing
Diagnostics
Checking pr
ocedur
e
Remedy
Compr
essor block err
or
Is the compr
essor working?
Does it switch of
f immediately after being tur
ned on?
1.
Check the compr
essor
.
2.
Replace the compr
essor
.
Compr
essor overheating err
or
(cir
cuit br
eaker cut in) or
outdoor compr
essor ther
mistor
TH1 has shor
ted.
1.
Is the outdoor unit drainage outlet blocked?
2.
Is supply voltage at least 198V when the unit is
operating at full power?
3.
Check for leakage of r
efrigerant fr
om line
connections.
4.
Check ther
mistor gr
oup wiring.
1.
Fr
ee the outlet.
2.
Restor
e corr
ect power supply
.
3.
Top up to r
equir
ed level.
4.
Replace the indoor unit contr
ol
boar
d gr
oup or the ther
mistor
gr
oup.
Nor
mal
Power factor module err
or
Check wiring of power factor module
Replace the power factor module
Shor
t cir
cuit err
or on ther
mistor
Measur
e r
esistance of TH2 ther
mistor on outdoor unit
Replace the outdoor unit ther
mistor
assembly
Open cir
cuit err
or on ther
mistor
1.
Ar
e the outdoor unit ther
mistor ter
minals well
connected?
2.
Check ther
mistor gr
oup wiring.
1.
Reconnect
2.
Replace the outdoor
ther
mistor assembly
.
AC curr
ent err
or
Can voltage be detected on the curr
ent transfor
mer
on the outdoor unit contr
ol boar
d?
Wiring is faulty
. Replace the
outdoor unit contr
ol boar
d.
AC over
curr
ent err
or
Is the outdoor unit drainage outlet blocked?
Fr
ee the drainage outlet.
Condensate drainage
device err
or
1.
Is the drainage outlet blocked?
2.
Does the drainage motor work?
1.
Fr
ee the drainage outlet.
2.
Replace the motor
.
Serial por
t shor
t cir
cuit
Check wiring connections between units.
Reconnect wiring.
Serial por
t open
Check wiring connections between units.
Reconnect wiring.
Outdoor power supply does
not switch on.
Wiring err
or
1.
Check wiring connections between units.
2.
Check outdoor unit fuse.
3.
Indoor unit contr
ol boar
d fault.
4.
Outdoor unit contr
ol boar
d fault.
1.
Reconnect wiring.
2.
Replace the fuse; r
eplace the
outdoor unit contr
ol boar
d.
3.
Replace the boar
d.
4.
Replace the boar
d.
1
cycle
2
cycles
3
cycles
4
cycles
5
cycles
6
cycles
7
cycles
:flashes ever
y 2 seconds
:
flashes 3 times at intervals of 0.2 seconds
: on
: of
f
Diagnostics procedure in display mode.
In the event that the timer lamp flashes during unit operation, consult the table below.
To activate the diagnostics function, switch off unit operation by means of the remote control handset, then press the “Aux” bu
tton for at least 5 seconds.
N.B.:
1.
Press and hold the “Aux” button for 5 seconds (after the unit has been switched off) to read the diagnostics memory.
Normal:
timer lamp only flashes.
Error:
operation lamp flashes.
2.
Diagnostics memory is erased when the unit plug is disconnected or switch is set to the OFF position.
Click on the first or last page to see other GU-XC157 service manuals if exist.