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HOW TO OPERATE USING THE SERVICE SWITCH THE OUTDOOR UNIT
1. Turn off the power supply to outdoor unit and then turn on again.
2. Remove the electrical box cover.
LD303 (red) will light and the unit will operate in the forced cooling mode at this time.
Never operate the unit for
more than 5 minutes.
(Cautions)
(1) If interface signal (DC 35V) terminals C and D are not connected when the outdoor unit is in forced cool mode, the outdoor
unit defect indicator (LD301) will blink 9 times during operation to indicate communication error.
(2) If checking is done with the compressor connector disconnected, the unit will continue normal operation when the
electrical parts are normal, or it will repeat operating for approx. one minute and stop due to overload power limit cut,
or it will operate in the overload status.
Be sure to push the service switch again to stop the forced cool operation.
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.
Charge refrigerant of 300g
after vacuuming ( 1 )
Do not operate for more than 5
minutes
Parts to be prepared
(1) Reducing union
2/8” (6.35mm)
1/2” (12.7mm)
(2) Copper pipe (2/8” and 1/2”)
(3) Shorting leads
2 leads approx. 10 cm long
with alligator clip or IC clip
1. Connect the large dia. pipe side and small dia. pipe side service valves using a pipe.
Large dia. service valve
Reducing union
(2/8” and 3/8”)
Copper pipe
(2/8”)
Small diameter
service valve
Reversing
valve
Compressor
Outdoor unit
Connect the small diameter
service value and the large
diameter service valve using the
reducing union and copper pipe
as shown on the right.
Electrical Box Cover
Service switch
(forced-cooling mode is set by
pressing for 1 second or more,
and stopped by pressing again.)
LD301
LD302
LD303
LD304
0305E Pg 90-109
4/1/06, 11:01 AM
104
Summary of Contents for Summit RAC-70YH5
Page 36: ... 35 CIRCUIT DIAGRAM MODEL RAS 70YH5 0305E Pg 35 4 1 06 10 52 AM 1 ...
Page 37: ... 37 CIRCUIT DIAGRAM MODEL RAC 70YH5 0305E Pg 37 4 1 06 10 53 AM 1 ...
Page 39: ... 40 MODEL RAC 70YH5 MAIN P W B 0305E Pg 39 42 4 1 06 10 53 AM 40 ...
Page 40: ... 41 MAIN P W B NF P W B CAPA P W B 0305E Pg 39 42 4 1 06 10 53 AM 41 ...
Page 42: ... 43 51 53 53 55 57 49 29 66 22 0305E Pg 43 4 1 06 10 54 AM 1 ...
Page 86: ... 94 6 Check the main P W B power circuit 0305E Pg 90 109 4 1 06 11 01 AM 94 ...
Page 87: ... 95 CHECKING THE REMOTE CONTROLLER 0305E Pg 90 109 4 1 06 11 01 AM 95 ...
Page 92: ... 100 0305E Pg 90 109 4 1 06 11 01 AM 100 ...
Page 102: ...HITACHI PM NO 0305E Printed in Malaysia RAS 70YH5 RAC 70YH5 0305E cover 4 1 06 12 03 PM 2 ...