Daikin VRV III-S RXYMQ36 48PVJU, Service Manual

Page: 186 / 264

SiUS34-907 Troubleshooting by Indication on the Remote Controller
Troubleshooting 177
Po w er OFF
Po w er O N
N O
N O
Replace the main PCB.
*
If the PCB replaced is b adly
damaged, the fan motor is
likely to fail. To make s
u re,
recheck the compressor.
Has the
fan dri v er ca u sed
damage?
YES
N O
Recheck for the po w er s u pply. If
there is no pro b lem w ith the
po w er s u pply, replace the A3P
noise filter PCB.
If the malf
u nction rec u rs,
replace the in v erter PCB.
Check the harness, and then
replace it if necessary.
YES
Stop (stand b y)
b efore the fan rotates.
Recheck for the po w er s u pply. If
there is no pro b lem w ith the
po w er s u pply, replace the main
PCB (A1P).
*
If the PCB replaced is b adly
damaged, compressor is likely
to fail. To make s
u re, recheck
the compressor.
YES
Stop (stand b y)
w hen the compressor
starts u p.
N O
N O
End of meas u res:
The malf u nction may
temporarily res u lt from onsite
ca u ses.
Ca u ses: Instantaneo u s po w er
fail u re (open phase), noises,
or else.
The "
U2
"
malf u nction rec u rs.
YES
T u rn O N the po w er s u pply.
A
Replace the main PCB (A1P).
O
b ser v e the conditions of the
PCB.
Has the
po w er transistor got
fa u lty?
Has the
main PCB ca u sed
damage?
YES
Check the fan dri v er po w er transistor.
Replace the main PCB.
*
If the PCB replaced is b adly
damaged, the compressor is
likely to fail. To make s
u re,
recheck the compressor.
YES
N O