Fault Codes - Hitachi RPIL-1.0UNE1NH Service Manual

2 . T R O U B L E S H
2 . T R O U B L E S H

2.2 Fault codes

The following is the fault code table of outdoor.
Fault
Fault Description
code
Outdoor ambient
1 temperature
sensor fault
Outdoor coil
2 temperature
sensor fault
The unit
3 over-current turn
off fault
4 EEprom Data error
Cooling freezing
protection(the
indoor coil
temperature is too
5
low) or heating
overload(indoor
coil temperature is
too high)
O O T I N G
O O T I N G
Sheet 1 Outdoor Fault code
Possible Reason of Abnormality
1.The outdoor ambient temperature
sensor connect loose;
2.The outdoor ambient temperature
sensor is failure;
3.The sampling circuit is failure
1.The outdoor coil temperature sensor
connect loose;
2.The outdoor coil temperature sensor is
failure;
3.The sampling circuit is failure
1.Control board current sampling circuit
is failure;
2.The current is over high because of the
supply voltage is too low;
3.The compressor is blocked;
4. Overload in cooling mode;
5.Overload in heating mode.
1.EE components is failure; 2.EE
components control circuit failure;
3.EE components insert incorrect
1.The indoor unit can not blow air
normally;
2.The room temperature is too low in
cooling mode or the room temperature
is too high in heating;
3.The filter is dirty;
4.The duct resistance is too high to
result in low air flow;
5.The setting fan speed is too low;
6. The indoor unit is not standard
installed, air inlet is too near with air
outlet .
How to Deal With
1.Reconnect the outdoor ambient
temperature sensor;
2.Replace the outdoor ambient
temperature sensor omponents;
3.Replace the outdoor control board
components.
1.Reconnect the outdoor coil
temperature sensor;
2.Replace the outdoor coil temperature
sensor components;
3.Replace the outdoor control board
components.
1. Replace the electrical control
board components;
2. Normally protection;
3. Replace the compressor;
4. Please see the Note 3;
5. Please see the Note 4.
1.Replace the EE components;
2.Replace the outdoor control
board components;
3.Reassembly the EE components.
1.Check the indoor fan, indoor fan motor
and evaporator whether normally;
2. Normally protection;
3.Clean the filter;
4.Check the volume control
valve,duct length etc;
5.Set the speed with high speed;
6.Reinstall the indoor unit refer to
the user manual to change the
distance between the indoor unit and
the wall or ceiling.
21
Remarks