11. Possible Faults and their Remedies

Description of defect, external symptoms	Probable Reason	Remedy	Notes
Indicator not lighted No output impulses	Bad contact with the battery Defective or discharged battery	Check battery contacts Replace battery with fully-charged one
Begavior of apparatus differs from that described in this manual	Discharged battery Faulty apparatus	Replace battery with fully-charged one Check apparatus in test mode according to section 8

Note: If the fault is not connected with the battery, the apparatus should be returned to the factory to be repaired.