E4" Indoor Unit: Actuation Of Low Pressure Sensor - Daikin ALTHERMA HT ERSQ 011 AA Service Manual

Troubleshooting by Indication on the Remote Controller
3.17 "E4 " Indoor Unit: Actuation of Low Pressure Sensor
E4
Remote Control
Display
Subcode 6
Applicable Models All indoor units
Method of
Abnormality is detected by the pressure value with the low pressure sensor.
Malfunction
Detection
Malfunction Error is generated when the low pressure is dropped under specific pressure.
Decision Conditions Operating pressure: 0.07MPa
 Abnormal drop of low pressure (Lower than 0.07MPa)
Supposed Causes
 Defect of low pressure sensor
 Defect control PC board (A4P)
 Stop valve is not opened.
Troubleshooting
correct precautions when servicing.
164
Warning: CAPACITOR SHOCK HAZARD. The capacitors (top surfaces) can hold up to 220V. Use
ESIE09-08A
Troubleshooting