Hitachi EP-A7000 Alert Display, Troubleshooting Guide, Before asking for repair, Symptom, Cause

P.E-22

P.E-22

P.E-15

P.E-21

Alert Display

Symptom		Cause
All airflow indicators	are blinking.	Faulty fan rotation.

Stop the operation, unplug the power cord from AC outlet and contact your dealer for service.

Troubleshooting Guide

Before asking for repair check the following once again

Symptom

No air blows out or power does not turn on

Smoke or smell is not efficiently removed, or there is an odor

No remote operation

Airflow rate does not decrease even though the air is clean

Airflow rate does not increase even though the air is contaminated

“Air Sensor” indicator is kept constantly lit in green

“Air Sensor” indicator is kept blinking in green.

Check to see

Is power plug securely inserted into AC outlet?

Is breaker switched off?

Is the pre-filter dirty?

Is the filter dirty?

Are polarities of batteries correct?

Are batteries dead?

Is the remote infrared receiver dirty?

Is airflow rate switched?

Is the operation in the “Humidify” mode?

Is sensor sensitivity high?

Is airflow rate switched?

Is odor sensor hole blocked by dust or other obstacle?

Is sensor sensitivity low?

Was the ambient air clean when the purifier power cord was plugged into AC outlet?

Is the purifier installed in a place out of reach of odor or dust?

Is odor sensor hole blocked by dust or other obstacle?

Is the dust sensor covered with dust?

Is odor sensor hole blocked by dust or other obstacle?

Solution

Securely insert the power plug into AC outlet.

Switch on breaker.

Clean the pre-filter, referring to the “Pre- filter” in “Cleaning”.

Replace the filter, referring to the “Filter Replacement”. The filter may need to be replaced sooner depending on the place of

installation and conditions of use. P.E-23

Insert the batteries with correct
polarities.	P.E-9
Replace the batteries.	P.E-9
Clean the remote infrared receiver.	P.E-22

Press the airflow button and select Auto

Sensor or other airflow rate. P.E-11,E-14

Airflow rate will not decrease when humidity is low.

Change the sensor sensitivity

setting.P.E-16

Press the airflow button and select Auto

Sensor or other airflow rate. P.E-11-E-14

Clean the odor sensor. P.E-22

Change the sensor sensitivity

setting.P.E-16

Change the airflow rate. Or open a window and plug the power cord into AC outlet when ambient air is clean.

Relocate the air purifier.

Clean the odor sensor.

Clean the dust sensor.

Clean the odor sensor.

Filter Replacement Alert Display Troubleshooting Guide

E-25