GoodKnight 425 / 425ST Service Manual
P/N: M-145MAT00-20 Rev. A - Page Rev.A 5
B. ELETRICAL DIAGRAM II-5
1) General Block diagram II-5
2) Micro-controller II-6
3) Pressure measurement chain block diagram II-7
4) Flow measurement chain block diagram II-7
5) Temperature measurement II-8
6) Serial Link II-8
III - SERVICE AND REPAIR III-1
A. PERFORMANCE VERIFICATION III-3
1) General information III-3
2) Frequency III-3
3) Equipment required III-3
4) Preparation for testing III-4
5) Verification with computer III-5
5-a) Preparation III-7
5-b) Pressure verification and calibration III-7
5-c) Verification of the Flow measurement chain III-8
5-d) Verification of the ramp III-9
5-e) Verification of the backup frequency (425ST only) III-9
6) Performance Verification with keypad III-10
6-a) Verification of the pressure without computer III-10
6-b) Ramp verification III-12
6-c) Verification of the backup frequency (425ST only) III-13
7) Configuration with factory settings III-14
8) Entering the serial number and hour meter values III-15
9) “Service” hour meters III-15
10) Setting the Clock with keypad III-16
B. CALIBRATION PROCEDURE III-18
1) Equipment required III-18
2) Pressure sensor calibration III-19
3) Flow sensor calibration III-20
C. DISASSEMBLY III-22
D. TROUBLESHOOTING GUIDE III-20
Information Messages III-21
E. ERROR MESSAGES III-26
¨HISTORY RECORD FORM III-27
IV - SPARE PARTS IV-1
