Mindray A7 Service Manual

A7™ Service Manual 046-006272-00 5 - 49
Repair and Troubleshooting Pneumatic Circuit System Problems
FIGURE 5-40
24. Release the negative pressure ball. If the negative pressure ball is fully expanded within 30
seconds, it indicates that the needle valve leaks.
5.3.3.3 Leak Test of the System Switch Assembly
Perform a leak test of the system switch assembly by using the following tools:
• Negative pressure ball (quantity:1)
• 3106-06-00 adapter connector (quantity:1)
• 3106-06-08 adapter connector (quantity:1)
• 3126-08-00 tube plug (quantity:1)
• PU tube (6X100) (quantity:1)
Test procedures:
1. Turn off the pipeline gas supplies and turn on the system switch. Bleed the residual pressure by
opening the flow regulators.
2. Pull out No.45 which connects the system switch assembly to the flow regulator. Disconnect at
the flow regulator end and connect the pulled-out tube end to the negative ball through one
3106-06-00 adapter connector.
3. Pull out No.43 which connects the system switch assembly to the Y piece. Disconnect at the Y
piece end and occlude the pulled-out tube end through one 3106-06-08 adapter connector
and one 3126-08-00 tube plug.
4. Flatten the negative pressure ball to remove the gas inside.

Mindray A7 Specifications

General

Type	Anesthesia Workstation
Brand	Mindray
Model	A7
Display	15-inch color touchscreen
Oxygen Flush	Yes
Gas Inlets	O2, N2O, Air
Ventilation Modes	SIMV, PSV
Breathing System	Integrated
Gas Monitoring	O2, CO2, N2O
Monitoring Parameters	FiO2
CO2 Monitoring	Mainstream or Sidestream
Power Supply	100-240 V, 50/60 Hz