Toyotomi TAN-A28FWIS Service Manual page 16

CHECK A FOLLOWING STEPS
〔fig. 1〕Continuity of current fuse on the TAG PCB (main)
Take off the connector 2 on the TAG PCB (main),
and check the continuity.
〔fig. 2〕 Voltage of TAN fan motor on the TAN PCB (main)
blue
red
yellow
TAN fan motor
connector
《Check the TAN PCB(main)》
Measure the voltage between the connector pins in the back of
TAN PCB(main)
〔fig. 4〕 Resistance of louver motor
(5)
(1)
common terminal
terminal block
Normal:360 ∼ 390Ω
Take off the connector and check the resistance between
the common terminal and each terminal
〔fig. 6〕Voltage of PCB(Power module)
DC5V±1V
DC15V±2V
−
8
Measure both voltages as follows
without taking off the connectors.
between (3) in the and
24 8
approx. DC 5V ± 1V
between (8) in the and
23 8
approx. DC 15V ± 2V
attention
electric shock
Normal:110V ∼ 230V
tester
voltage
tester
resistance
TAG PCB(main)
＋
＋
24
23
Both PCB (Power module)
and TAG PCB(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〕PCB(Power module)
1 2 3 W V
4
-N 5
AC AC
+P
GR P.
∼
Take off the connectors
1
Measure the resistance, between U-V, V-W, W-U, V-U, W-V, U-W,
respectively.
If all the figures show infinite (more than hundreds of kΩ) and similar
one another( ± 30%) then the module is normal condition.
if not, it is defective.
〔fig. 7〕Resistance of TAG PCB(main)
Over 1kΩ
Over 1kΩ
−
8
Measure both resistances as follows
after taking off the connectors.
between (3) in the and
24 8
over 1kΩ between (8) in the
approx. over 1kΩ
8
– 15 –
0Ω
0Ω
FUSE
4-way valve coil
1.5kΩ
Normal:1.5k Ω
U
8
6 7
9
PCB(Power module)
in PCB(Power module)
9
＋
TAG PCB(main)
24
＋
23
approx.
TAG PCB(main) is normal.
and
23