Hitachi RAS-10XH1 Service Manual page 122

How to run the product with the outdoor unit test switch
1) When you are obliged to start the product on the outdoor unit side for the purpose of servicing
1. Turn off the power, wait for at least 10 seconds, and turn the power back on.
2. Turn on the indoor unit power relay by using the "air purification" button on the remote control unit.
Then ensure that the outdoor unit will be energized.
3. Detach the electrical installation lid from the outdoor unit and ensure that the "LD301" is blinking
once.
4. Pressing the test switch for 1 second or more will cause the "LD303" to go on and will start forcible
cooling.
※ (Initialization of the expansion valve may take about 1 minute to start.)
5. Pressing the "test switch" again for 1 second or more will stop the product.
2) If the indoor electrical installation is out of order and if you wish to run the outdoor unit
1. Turn on the outdoor terminal boards A and B (220-230 V AC).
2. Detach the electrical installation lid from the outdoor unit and ensure that the "LD301" is blinking
once.
3. Pressing the test switch for 1 second or more will cause the "LD303" to go on and start the forcible
cooling.
※ (Initialization of the expansion valve may take about 1 minute to start.)
4. Pressing the "test switch" again for 1 second or more will stop the product.
DC VOLTAGE
MESUREMENT
POINT(+)
DC VOLTAGE
MESUREMENT
POINT(-)
※Cautions
1. Applying power directly to the outdoor unit will cause a rush current to stress the outdoor unit.
Therefore, if the indoor unit is not out of order, do not use the method descried in 2).
2. Before making the connections, be sure to turn off the breaker.
3. Do not under any circumstances run the product for more than 5 minutes.
4. Doing work with the compressor connector removed will cause the LD301 to blink 4 times.
It will not start.
5. For another test run, turn off the breaker and turn it back on. (The test switch is accepted only
once after power-on. After operation by remote control, it is not accepted.)
6. When the operation with the test switch is over, turn off the breaker and set the connectors back.
TEST SWITCH
IPM
OUTDOOR FAN
MOTOR CONNECTOR
CONTROL P.W.B.
CN30 FOR SELF-CHECK
– 139 –
LD301
LD302
LD303