High Pressure Switch S1Ph - Daikin EDLQO5CAV3 Service Manual

ESIE15-08B | Part 2. Troubleshooting

5.6. High pressure switch S1PH

Technical specification
The high pressure switch S1PH has a normally closed contact. If the pressure
exceeds 41.7 (+0 / - 1) bar the contact will open; if the pressure drops
below 32 (±2) bar the contact will close.
Location
Piping diagram
Check procedure
Electrical check
W : R
ARNING
• When reconnecting a connector to the PCB, do not apply force or damage the connector or the connector pins on
the PCB.
1. Switch off the Daikin Altherma Monobloc CA via the user interface.
2. Switch off the Daikin Altherma Monobloc CA with the field supplied circuit breaker.
3. Remove the hydrobox top plate assembly, refer to
4. Remove the hydrobox front plate, refer to
5. Remove the top plate, refer to
6. Remove the front plate assembly, refer to
7. Open the compressor insulation.
8. Disconnect the connector S40 from PCB1.
9. Recover the refrigerant.
10. Pressurize the refrigerant circuit at 41.7 bar with nitrogen.
11. Measure the switch contacts between S40: pin 1 and 2; the switch must be open.
12. Replace the high pressure switch S1PH if the contact is not open, refer to
page 129".
13. Lower the refrigerant circuit pressure to 30 bar.
14. Measure the switch contacts between S40: pin 1 and 2; the switch must be closed.
15. Replace the high pressure switch S1PH if the contact is not closed, refer to
page 129.
Page 96
Daikin Altherma Monobloc CA
PCB1
F
ISK OF IRE
"Removing the hydrobox top plate assembly" on page 110
"Removing the hydrobox front plate" on page
"Removing the top plate" on page
"Removing the front plate assembly" on page
5. Component checklist - Refrigerant Circuit
Description
The high pressure switch S1PH is a safety com-
ponent that stops the compressor if overpressure
is detected in the refrigerant circuit.
Unit
111.
112.
113.
"Replacing the high pressure switch S1PH" on
"Replacing the high pressure switch S1PH" on
19/07/16