LT-2023
12
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 220/230/240
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 unit is
disconnected
Reconnect quick-connect terminal
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
Pressure relief valve activated – “popping”
sound
Connector on PC board not connected Connect connector
Blown fuse on PC board Replace fuse
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 be
restarted for several minutes
Compressor overheated due to:
1. Occluded lters 1. Clean or replace lters
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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