Hitachi RAM-130QH5, Service Manual, Page: 72 / 84

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HOW TO OPERATE USING THE SERVICE SWITCH THE OUTDOOR UNIT
1. Turn the Power switch off and then turn on again.
2. Remove the electrical parts cover.
3. Press the service switch for one second or more (wait for at least
30 seconds after turning the power source switch on).
Never operate the unit
in this state for more
than 5 minutes
Open the top cover
Open the lower
electrical cover
Open the upper electrical cover
Open the cabinet cover
Remove the L-angle
(Cautions)
(1) If interface signal (35V DC) terminals C and D
are not connected when the outdoor unit service
switch is used for checking, the outdoor defects
indicator (LD304) will blink to indicate
communication error
(2) If you do this with the compressor connector in
a removed state, LD301 will blink four times,
and the unit will not work.
Outdoor electrical unit 1
Outdoor electrical unit 2
Be sure to return the service switch to ìnormalî after checking with service operation is completed.
OUTDOOR ELECTRICAL UNIT 1
OUTDOOR ELECTRICAL UNIT 2
LD301 LD302 LD303 LD304
LD301 LD302 LD303 LD304
ÇO?E?E?E?E?EÇ`
ÇO?E?E?E?E?EÇ`
ÇPÇR
ÇPÇS
ÇPÇS ÇPÇR
A B B
S
S
Service switch
(forced-cooling mode is set by
pressing for one second or more
and stopped by pressing again)
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 af-
ter vacuuming ( 1)
(1) Reducing union
2/8" (6.35mm)
3/8" (9.52mm)
(2) Copper pipe (2/8" and 3/8")
Parts to be prepared
Do not operate for 5 minutes or
more
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.
Outdoor unit 1 or Outdoor unit 2
HOW TO OPERATE THE OUTDOOR UNIT INDEPENDENTLY