Hitachi RAS-25SX8 Manuel De Maintenance page 241

HOW TO OPERATE THE OUTDOOR UNIT INDEPENDENTLY
1. Connect the large dia. pipe side and small dia. pipe side service valves using a pipe.
Connect the small diameter
service value and the large
diameter service valve using the
reducing union and copper pipe
as shown on the right.
Charge refrigerant of 300g
after vacuuming ( ※1)
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.
Lighting mode of the self-diagnosis lamp
1
Mounting location of the self-diagnosis lamp
DC VOLTAGE
MESUREMENT
POINT(＋)
DC VOLTAGE
MESUREMENT
POINT(−)
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Outdoor unit
Compressor
Reversing
valve
TEST SWITCH
IPM
OUTDOOR FAN
MOTOR CONNECTOR
manuals search engine
Large dia.service valve
Reducing union
(2/8" and 3/8")
Copper pipe
(2/8")
Small diameter
service valve
CONTROL P.W.B.
CN30 FOR SELF-CHECK
– 274 –
Parts to be prepared
Reducing union
(1)
2/8" (6.35mm)
3/8" (9.52mm)
Copper pipe (2/8" and 3/8")
(2)
Shorting leads
(3)
2 leads approx. 10 cm long
with alligator clip or IC clip
Do not operate for 5 minutes
or more.
LD301
LD302
LD303