Daikin SKYAIR - E3 Abnormal High Pressure (Detected by the HPS)

SiBE28-804 Troubleshooting by Remote Controller Display / LED Display
Troubleshooting 179
5.19 “
E3
” Abnormal High Pressure (Detected by the HPS)
Remote
Controller
Display
E3
Method of
Malfunction
Detection
The protection device circuit checks continuity in the high pressure switch.
Malfunction
Decision
Conditions
When the high pressure switch is actuated
Actuating pressure:
RZQ(S)71~140
Supposed
Causes

Faulty high pressure switch

Disconnection in high pressure switch harness

Faulty connection of high pressure switch connector

Clogged indoor unit suction filter (in heating operation)

Dirty outdoor unit heat exchanger

Faulty outdoor unit fan

Refrigerant overcharge

Stop valve is left in closed.
HPS settings The table below contains the preset HPS values.
High pressure switch Fuse
Open Close
RZQ(S)71 4.0 Mpa +0/-0.15 3.0 +/-0.15 6.3A/250V
RZQ(S)100
RZQ(S)125
RZQ(S)140