Toyotomi TAN/TAG-A28EWI Service Manual page 19

TAN/TAG-A28EWI, TAN/TAG-A32EWI
CHECK A FOLLOWING STEPS
〔fig. 1〕Continuity of current fuse on the PCB (TAG main)
Take off the connectors 1 & 5 on the PCB (TAG main), and
check the continuity.
〔fig. 2〕Voltage of TAN fan motor on the PCB(TAN main)
BL Y W B R
TAN fan motor connector
＋ −
PCB(TAG main)
between red ＋ and black − approx.DC325V
between yellow ＋ and black − approx.DC3
between white ＋ and black − approx.DC15V
〔fig. 4〕Resistance of louver motor
Take off the connector and check the resistance between
the teminals
〔fig. 6〕Voltage of Power module
PCB(TAG main)
DC22V±3V
−
7
Measure both voltages as follows
without taking off the connectors.
between 7 in the 16 and 1
in the 15 approx. DC 12V ± 2V
between 6 in the 15 and 7
approx. DC 22V ± 3V
All manuals and user guides at all-guides.com
Measure the voltage between
the connector pins in the back
of PCB (TAN main) during
cooling operation.
PCB(TAN main)
∼
5V
is Normal
Normal:360 ∼ 390Ω
common terminal
360∼390Ω
DC12V±2V
＋
＋
−
15
16
Both power module
and PCB (TAG main)
are normal
TROUBLESHOOTING GUIDE
FUSE
〔fig. 3〕Resistance of 4-way valve coil
※ Take off the connector and check the Resistance
of 4-way valve coil
〔fig. 5〕Resistance of Power module
power module
Measure the resistance, six times between U-V, V-W, W-U respec-
tively by changing the polarity,and if all the figures show infinite (more
than hundreds of k Ω ) then it is normal condition.
if not, it is defective.
〔fig. 7〕Resistance of PCB(TAG main)
PCB(TAG main)
over 1kΩ
−
7
Measure both resistances as follows
after taking off the connectors.
between 7 in the 16 and 1 in the
15 approx. over 1kΩ between 6
in the 15 and 7 approx. over 1kΩ
– 18 –
0Ω
0Ω
FUSE
4-way valve coil
1.5kΩ
Normal:1.5kΩ
over 1kΩ
＋
＋
−
15
16
PCB(TAG main) is normal.