Q155 Service Manual
ii
4.3.1. Solenoid Valve Assembly Replacement ............................................... 4-2
4.3.2. Solenoid Coil Replacement ................................................................. 4-1
4.3.3. Sieve Bed Replacement....................................................................... 4-2
4.4. Compressor ................................................................................................ 4-3
4.4.1. Compressor Maintenance .................................................................... 4-3
4.4.2. Compressor Assembly Replacement.................................................... 4-3
4.4.3. Compressor Relief Valve Test and Replacement .................................. 4-4
4.4.4. Capacitor Replacement ....................................................................... 4-5
4.5. Axial Fan Replacement............................................................................... 4-6
4.6. Circuit Board Replacement ......................................................................... 4-7
4.6.1. Circuit Board Removal ....................................................................... 4-7
4.6.2. Circuit Board Installation .................................................................... 4-8
4.6.3. Oxygen Sensor Circuit Board Removal............................................... 4-8
4.6.4. Oxygen Sensor Circuit Board Installation ........................................... 4-9
4.7. Product Regulator Setting and Replacement................................................ 4-9
4.8. Circuit Breaker Replacement .....................................................................4-10
4.8.1. Circuit Breaker Removal....................................................................4-10
4.8.2. Circuit Breaker Installation ................................................................4-11
4.9. ON/OFF Power Switch Replacement .........................................................4-11
4.9.1. ON/OFF Power Switch Removal .......................................................4-11
4.9.2. ON/OFF Power Switch Installation ....................................................4-12
4.10.
Oxygen Monitor LED Replacement ...................................................4-12
4.11. Hour Meter Replacement ...........................................................................4-12
4.12.
Flow meter Replacement....................................................................4-13
4.12.1. Flow meter Removal..........................................................................4-13
4.12.2. Flow meter Installation ......................................................................4-14
4.13.
Buzzer Replacement ..........................................................................4-14
4.14.
Operating Pressure Test......................................................................4-15
4.15.
High Operating Pressure ....................................................................4-15
4.16.
Low Operating Pressure .....................................................................4-15
4.17.
Leak Test Procedure...........................................................................4-16
5.
Maintenance
5-1
5.1. Routine Maintenance .................................................................................. 5-1
5.2. Cabinet Air Inlet Filter ................................................................................ 5-1
5.3. Air Intake Fine Particle Filter...................................................................... 5-1
5.4. Bacteria Filter Replacement ........................................................................ 5-2
6.
Troubleshooting
6-1
7.
Spare Parts
7-1
8.
Tool Kit
8-1
Appendix A: Exploded Drawings
......................................................................A-1