Mindray BeneFusion SP3, Service Manual

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4-2

PS--AD value of pressure sensor (Normal range -2300-6000), AD value is about
10 when no syringe is installed.

VCC--Voltage value of 5V power supply (Normal range 4.5-5.5)

VMM--Voltage value of motor power supply (Normal range 15-24)

VDD--Voltage value of 3.3V power supply (Normal range 3.1-3.5)

VDDB--Voltage value of backup 3.3V power supply (Normal range 2.9-3.7)

REF--Voltage value of reference power supply (Normal range 2.45-2.55)

EDC--Voltage value of external DC power supply (Normal range 9-18 when DC
power supply is connected)

BAT1--Voltage value of main battery power supply (Normal range 5.8-8.8 when
the battery is installed)

BAT2--Voltage value of sub-battery power supply (Normal range 5.8-8.8 when
dual batteries are installed)

EDC--Output voltage value of AC power supply module (Normal range 9-18
when AC power supply is connected)

VCCB--Voltage value of backup 5V power supply (Normal range 4.5-5.5)

VGC--Voltage value of gold capacitor (Normal range 0-5.2)

Syringe--Syringe in-position or not sensor (0--not in position 1--in position)
4.4 Fault List
During the transportation, storage and use of SP3D, due to various factors (Such as
grid voltage instability, ambient temperature change, drop and impact, component
aging, etc.), faults may occur and affect normal use. At this time, the professional who
has experience in the maintenance of electronic medical instruments should refer to
the following fault classification for component-level maintenance. The so-called
component-level maintenance refers to fault location to a component after analysis,
substitution, and trial operation of the component, such as the power supply part, the
main control part, the monitoring part, and the LCD. Repair of the component itself,
that is, component-level maintenance, must be performed by engineers with
extensive maintenance experience using specialized instrument and equipment
under specific circumstances and conditions.
4.4.1 SP3 System Fault and Exception Code
The system can monitor and report alarms for some faults and exceptions. The
maintenance personnel can find the corresponding alarm descriptions in the
following table according to the alarm number and help locate the fault. The table
below gives the possible causes and suggested solutions.