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OPERATION INSTRUCTIONS
Starting Procedures
1. Switch ON the main power source to the
unit.
2. Set the operation switch of the room
thermostat to the desired operation position.
FAN-Ventilation Operation
COOL-Cooling Operation
3. Set the thermostat knob of the room
thermostat to the desired temperature.
4. Set the system switch of the room thermostat
to the ON position.
Stopping Procedures
1. Set the operation switch to the OFF position.
2. Switch OFF the main power source to the
unit.
HITACHI Split-System Air Conditioners
For Combined Models: RAS-NP4US+RAS-NP4CTS
Troubleshooting
Unit Does Not Start
1. Is the main power source switch to the unit
ON?
2. Is the main fuse normal?
3. Is the phase of main power source right?
Poor Cooling Operation
1. Are there any obstacles, which hamper
sufficient air to the condenser?
2. Check to ensure that the thermostat is set at
the desired position
3. Check the air filter for clogging.
4. Are there any obstacles, which hamper free
air
flow to the room thermostat?
Please contact your service shop if the
trouble is still not solved.
RAS-NP5US+RAS-NP5CTS
RAS-NP6US+RAS-NP6CTS
RAS-NP8US+RAS-NP8CTS
RAS-NP9US+RAS-NP9CTS
RAS-NP10US+RAS-NP10CTS
RAS-NP13US+RAS-NP13CTS
RAS-NP15US+RAS-NP15CTS
Maintenance
1. Clean or replace the filter.
2. Clean the cabinet with cleaner.
3. Clean the condensate drain pan and the drain
piping.
4. Clean the condenser. It is recommended that a
specialist be contacted for this type of work.
5. Check for abnormal sounds and vibration.
Stop the unit and contact your service shop, if
observed.
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