Hitachi RAS-25SX8 - How to Operate the Outdoor Unit Independently

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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
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)
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
CN30 FOR SELF-CHECK
LD301
LD302
LD303
CONTROL P.W.B.
TEST SWITCH
OUTDOOR FAN
MOTOR CONNECTOR
IPM
DCVOLTAGE
MESUREMENT
POINT(＋)
DCVOLTAGE
MESUREMENT
POINT(−)