Section 4: Service Mode; Introduction; Service Level 1; Information Screen - Mallinckrodt Nellcor NPB-70 Service Manual

SECTION 4: SERVICE MODE

4.1

INTRODUCTION

4.2

SERVICE LEVEL 1

4.2.1

Information Screen

4.2.2

Event Messages Screen

4.1 Introduction
4.2 Service Level 1
4.3 Service Level 2
The monitor supports a service mode built into the instrument's firmware.
The architecture of the monitor's service mode divides the service mode
into two levels as described in the sections below.
• Service Level 1
• Service Level 2
To access the service mode (levels 1 and 2), refer to Tables 4-1 and 4-2.
The Service Level 1 provides information and tools on three service
screens to test and calibrate specific functions without disassembling the
monitor.
• Information Screen
• Event Messages Screen
• Interface Test Screen
From these display screens the service technician can check the operating
hours counter and event messages, test the Human Interface functions
(HMI), set the light detection threshold, adjust the LCD contrast middle
point and do a calibration check and a calibration process, if necessary.
Refer to Table 4-1.
The information screen displays the monitor's serial
CO board number, the number of operating hours, and the
2
CO board's software version.
2
The monitor automatically performs a series of built-in tests (BITs) at
start-up and during operation to check sub-systems and modules for
errors. The event messages screen lists the last five event messages, the
time each occurred relative to the unit's operating hours, and a
recommended service action. There are two event messages and each has
a specific response as follows:
Event Message:
CO board
2
Flow
Action:
Replace CO board
2
Replace Flow System and/or Pump
Refer to Section 5: Troubleshooting
4-1