Sunrise Medical DeVilbiss 505DZ Service Manual page 21

B.
Visible Alarm
Blinking
Other Symptoms
1.
Fan off.
2.
Fan operating
C.
Visible Alarm
Blinking
Other Symptoms
No oxygen flow.
1.
D.
Visible Alarm
ON
Other Symptoms
Fan operating, no indicator
1.
lights illuminated on PC
board.
T R O U B L E S H O O T I N G
Symptom
Audible Alarm
Pulsing
Possible Cause
1. Line cord not properly installed or defective.
2. No power at receptacle.
3. Oxygen concentrator circuit breaker
activated.
4. Line cord quick-connect terminal inside unit is
disconnected.
5. Defective power switch.
6. Defective circuit breaker.
1. Blown fuse on PC board.
2. Defective PC board.
Symptom
Audible Alarm
Pulsing
Possible Cause
1. Severe restriction of flow due to:
a. Crimped tubing.
b. Occluded humidifier.
c. Flow meter turned off or set too low.
Symptom
Audible Alarm
ON
Possible Cause
1. Defective PC board.
Compressor
OFF
Possible Remedy
1a. Insert plug in receptacle.
b. Replace line cord.
2a. Check building circuit breaker or fuse, or have house
wiring checked by qualified electrician.
b. Circuit may be fully loaded with other appliances
and another receptacle may be required.
3. Press the unit circuit breaker reset button. If unit
circuit breaker opens again, check internal wiring.
4. Reconnect quick-connect terminal.
5. Replace power switch.
6. Replace unit circuit breaker.
1. Replace fuse.
2. Replace PC board.
Compressor
ON
Possible Remedy
a. Straighten tubing.
b. Clean or replace humidifier.
c. Adjust flow meter.
Compressor
OFF
Possible Remedy
1. Replace PC Board
21
Power Light
OFF
Power Light
ON
Power Light
ON or OFF