Essilor AKR 550 Maintenance Manual

30
7-19 Cannot measure PD (cannot measure PD correctly)
Main causes when it cannot measure PD (cannot measure PD correctly:
・ Failure of PD meter ASSY
・ Failure of control board
NO
YES
Cannot measure PD.
Replace the PD meter ASSY.
Is the performance of PD
meter ASSY normal?
YES
Check the measurement start switch.
【Refer to 7-11.】
NO
Is the measurement start switch normal?
(Is the refractivity measurable?)
Replace the control board.
NO
Is the peripheral relay
harness connected correctly?
Connect the peripheral
relay harness correctly.
YES
OK

Essilor AKR 550 Specifications

General

Brand	Essilor
Model	AKR 550
Category	Medical Equipment
Language	English