Merits Q155, Service Manual, Page: 42 / 57

Q155 Service Manual
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6. Troubleshooting
SYMPTON PROBABLE CAUSE SOLUTION
No power on wall outlet. Inspect house circuit breakers or fuses.
Tripped or faulty circuit
breaker.
Reset or replace the circuit breaker.
Faulty cable plug. Replace the cable plug.
Power Loss while
power switch ON
Faulty power switch Replace the power switch.
Faulty temperature sensor Replace the temperature sensor
Air outlet block
Keep oxygen concentrator at least
three-inch away from walls, draperies
or furniture.
Faulty Cooling fan Replace the cooling fan.
Over-Heating alarm
Environmental temperature
too high
Control room temperature below 35
℃
Faulty Solenoid Coil Replace faulty Solenoid Coil
Clean foam filter or replace
Check the intake filter or replace it
Restriction in air passages
Check all the tubes from the exhaust of
air compressor to the oxygen outlet or
Replace the related faulty tubes
Faulty pressure sensor Replace faulty pressure sensor
High Pressure alarm
Faulty Control Board Replace Control Board
Faulty air compressor Replace faulty air compressor
Low Pressure alarm
Leaking
Refer section 4.17 Leak Test and repair
leaking.
Leaking
Refer section 4.17 Leak Test and repair
leaking.
Faulty oxygen monitor
board
Replace faulty oxygen monitor board.
Faulty regulator
Replace faulty regulator or reset the
regulator
Faulty solenoid valve Replace faulty solenoid valve
Relief valve release Replace faulty relief valve
Faulty compressor flow Replace or repair faulty compressor
Sieve bed contaminated or
molecule sieve invalid
Replace sieve bed
Environmental temperature
too high
Control room temperature below 35
℃
Restriction in exhaust
muffler
Replace or clean exhaust muffler
Clean foam filter or replace
Check the intake filter or replace it
Low Oxygen Purity
Restriction in air passages
Check all the tubes from the exhaust of
air compressor down to the oxygen
outlet or Replace the related faulty
tubes