High Pressure Abnormality (Detected By The High Pressure Switch) - Daikin RZQ Series FCQ20EVA Service Manual

SiME281501E
4.18 High Pressure Abnormality (Detected by the High
Pressure Switch)
E3
Error Code
Applicable RZQ
Models
Method of Error The protection device circuit checks continuity in the high pressure switch.
Detection
Error Decision
When the high pressure switch is actuated
Conditions
 Defective high pressure switch
Supposed
 Disconnection in high pressure switch harness
Causes
 Defective connection of high pressure switch connector
 Clogged indoor unit suction filter (in heating)
 Dirty outdoor unit heat exchanger (in cooling)
 Defective indoor unit fan motor (in heating)
 Defective outdoor unit fan motor (in cooling)
 Overcharge of refrigerant
 Stop valve is not opened.
 Defective outdoor unit PCB
High Pressure
The table below contains the preset high pressure switch values.
Switch Settings
RZQ20/24LVA
RZQ36/45LVA
RZQ45/48MYL
Service Diagnosis
High pressure switch
Model
Open
4.0 + 0/– 0.15 MPa
4.0 + 0/– 0.15 MPa
Troubleshooting by Remote Controller
Fuse
Close
6.3A/250V (F1U),
3.15A/250V (F6U)
3.0 ± 0.15 MPa
6.3A/250V (F1U, F3U, F4U),
5A/250V (F6U)
6.3A/250V (F1U (A1P), F2U,
3.0 ± 0.15 MPa F3U, F4U)
5.0A/250V (F1U (A2P))
108