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DeVilbiss 525 Series Service Manual Page 11

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  • TROUBLESHOOTING
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LT-2023
11
TROUBLESHOOTING
TROUBLESHOOTING CHART B
Visible Alarm Audible Alarm Compressor Power Light
Blinking Pulsing OFF OFF
Other Symptoms Possible Cause Possible Remedy
Fan off Line cord not properly installed or defective Insert plug in receptacle or replace line cord. On 220/240
Volt units, check that the IEC connector on the back of
the unit is attached.
No power at receptacle Check building circuit breaker or fuse, or have
house wiring checked by qualified electrician
Circuit may be fully loaded with other appliances
and another receptacle may be required. Wall
outlet should be independent of other appliances.
Oxygen concentrator circuit breaker activated Press the circuit breaker reset button
If unit circuit breaker opens again, check
internal wiring
Line cord quick-connect terminal inside Reconnect quick-connect terminal
unit is disconnected
Defective power switch Replace power switch
Defective circuit breaker Replace circuit breaker
TROUBLESHOOTING CHART C
Visible Alarm Audible Alarm Compressor Power Light
Blinking Pulsing ON ON/OFF
Other Symptoms Possible Cause Possible Remedy
Fan and compressor operating. Connector on PC board not connected Connect connector
Pressure relief valve activated – Blown fuse on PC board Replace fuse
“popping” sound Defective PC board Replace PC board
TROUBLESHOOTING CHART D
Visible Alarm Audible Alarm Compressor Power Light
ON ON OFF ON
Other Symptoms Possible Cause Possible Remedy
Fan operating Main wiring harness disconnected/defective Reconnect/replace wiring harness
Loose compressor wire Tighten or attach wire
Defective capacitor Replace capacitor
Defective compressor Replace compressor
Unit warm to the touch and cannot Compressor overheated due to:
be restarted for several minutes 1. Occluded filters 1. Clean or replace filters
2. Restricted input or output air passage 2. Remove obstruction
3. Low or high line voltage 3. Check line voltage; use alternate circuit
independent of other appliances
Defective cooling fan Replace cooling fan
Defective compressor Replace compressor
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