Hitachi RAC-10SH3, Service Manual, Page: 139 / 153

– 1 –
HOW TO OPERATE THE OUTDOOR UNIT INDEPENDENTLY
The operation method is the same as "How to operate using the connector to servicing the outdoor unit".
※ 1 The charging amount of 300g is equivalent to the load in normal operation.
1. Connect the large dia. pipe side and small dia. pipe side service valves using a pipe.
Parts to be prepared
Reducing union
2/8" (6.35mm)
3/8" (9.52mm)
Copper pipe (2/8" and 3/8")
Shorting leads
2 leads approx. 10 cm long
with alligator clip or IC clip
(1)
(2)
(3)
Connect the small diameter ser-
vice value and the large diame-
ter service valve using the re-
ducing union and copper pipe
as shown on the right.
Charge refrigerant of 300g
after vacuuming (
※
1)
Do not operate for 5 minutes
or more.
Outdoor unit
Large dia.service valve
Reducing union
(2/8" and 3/8")
Copper pipe
(2/8")
Small diameter
service valve
Compressor
Reversing
valve
1
Lighting mode of the self-diagnosis lamp
Mounting location of the self-diagnosis lamp
2A-FUSE
3.15A-FUSE
DC VOLTAGE MEASURING POINT(-)(IPM 33)
DC VOLTAGE MEASURING POINT(+)(IPM 25)
COMPRESSOR CONNECTOR（CN1）
CONNECTOR（CN24）
OUTDOOR FAN
IPM
MAIN P.W.B
SELF-CHECK CONNECTOR（CN30）
LD301
LD302
LD303
TEST SWITCH
LD301(RED)
LD302(RED)
LD303(RED)
TEST SWITCH
黑
棕
蓝
SELF-CHECK CONNECTOR（CN30）
OUTDOOR FAN CONNECTOR（CN24）
DC VOLTAGE MEASURING POINT(-)(IPM N)
DC VOLTAGE MEASURING POINT(+)(IPM P)
RAC-18SH3
RAC-10SH3 、 RAC-14SH3
37