CaptiveAire DOAS RTU Series, Инструкция по установке, эксплуатации и обслуживанию

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Vent Proving Switch (PS-01)
1. Verify wiring is connected properly.
2. Check that the vent tubing is routed correctly. Make sure the tube is not pinched or clogged.
3. Verify the bleed hole is not clogged (
Figure 59 ). The bleed hole reduces condensation build-up in the
switch and tubing.
4. Make sure the unit is OFF. Check the switch. Remove electrical connections. Check for continuity
between pin “C” to pin “NO”. There should be no continuity.
- If there is continuity, the switch has failed. Replace the switch.
- If there is no continuity, re-connect the electrical connections. Continue to the next step.
5. Connect a manometer between the pressure switch and hose. Turn the unit ON. Monitor the
manometer. Verify the value ( w.c. ) on the switch is correct.
- If the reading is below the value, there is an issue with the vacuum. Refer to “HMI Fault Codes”
on page 109 for more information.
- If the reading is above the value, continue to the next step.
6. With the unit ON. Check for voltage:
• Back probe connector J7 pin 14 to ground. There should be 24-28V AC .
• Back probe connector J7 pin 10 to ground. There should be 24-28V AC .
- If the voltage reading is incorrect, check the wiring for an open or short circuit. If the wiring check is
correct, the switch has failed. Replace the switch.
- If the voltage reading is correct, there may have been an intermittent fault.
Figure 59 - Vent Proving Switch
Oil Level Sensor (Sen-1)
Figure 60 - Oil Level Sensor
Refer to “Compressor Information” on page 50 for more
information on oil level sensor ( Figure 60 ).
1. Make sure the compressor is not running. Remove the oil level
sensor from the compressor.
2. Turn the unit ON, make sure the compressor is OFF by
pressing OFF on the LCP panel.
3. Check for voltage:
• Back probe connector J36 pin 7 to ground. There should be
26V AC without a mirror in front of the sensor.
• Back probe connector J36 pin 7 to ground. There should be 0V
AC with a mirror in front of the sensor.
- If the voltage reading is incorrect, check the wiring for an
open or short circuit. Check transformer voltages. If the wiring
and transformer check are correct, the sensor may have
failed.
- If the voltage reading is correct, verify the oil management
function is working properly. Add oil if needed.
Bleed
Hole
Hose to Pressure
Switch
Hose to Inducer
Hose to
Manometer
10
14
J7
PS-01
NO
C
PK
OR
7 8 9
J36
SEN-1
VOUT
COM
24V
GR
RD BK WH