Hitachi Utopia RPI-2.5HRG User Manual

1-69
TROUBLESHOOTING
Remove all the terminals of the ISPM before
check.
If items (a) to (h) are performed and the results
are satisfactory, ISPM is normal. Measure it
under 1 kΩ range of a tester.
(a) By touching the + side of the tester to the P1 terminal
of ISPM and the - side of the tester to R and S of
ISPM, measure the resistance. If all the resistances
are more than 100 kΩ, it is normal.
(b) By touching the - side of the tester to the P1 terminal
of ISPM and the + side of the tester to R and S of
ISPM, measure the resistance. If all the resistances
are more than 1 kΩ, it is normal.
(c) By touching the - side of the tester to the N terminal
of ISPM and the + side of the tester to R and S of
ISPM, measure the resistance. If all the resistances
are more than 100 kΩ, it is normal.
(d) By touching the + side of the tester to the N terminal
of ISPM and the - side of the tester to R and S of
ISPM, measure the resistance. If all the resistances
are more than 1 kΩ, it is normal.
(2) Checking Procedures ISPM
Rectification Parts of Internal Circuit of ISPM (Common)
R
S
T
P1
N
TB3
+
-
RS W
RB
VTU
NPD P
TB2
R216
R215
ZN20
LED201
ZN202
R201
R200
CN207 CN206
CN9
PC207
C
PC208
CN8
RB
N
P
P1
P1
R, S
TB3
+
-
RS W
RB
VTU
NPD P
TB2
R216
R215
ZN20
LED201
ZN202
R201
R200
CN207 CN206
CN9
PC207
C
PC208
CN8
RB
N
P
P1
P1
R, S
TB3
+
-
RS W
RB
VTU
NPD P
TB2
R216
R215
ZN20
LED201
ZN202
R201
R200
CN207 CN206
CN9
PC207
C
PC208
CN8
RB
N
P
P1
N
R, S
TB3
+
-
RS W
RB
VTU
NPD P
TB2
R216
R215
ZN20
LED201
ZN202
R201
R200
CN207 CN206
CN9
PC207
C
PC208
CN8
RB
N
P
P1
N
R, S
Do not use a digital tester.

Hitachi Utopia RPI-2.5HRG Specifications

General

Brand	Hitachi
Model	Utopia RPI-2.5HRG
Category	Air Conditioner
Language	English