Fisher & Paykel MR720, MR730, MR480, MR700 technical manual Check Voltage Rating Of Unit

54

C2 MR700 SERIES FAULT FLOW CHART FOR NO GO CONDITION

Check Voltage

Rating Of Unit

YES

Open Unit and check if thermal cut out under heaterplate has tripped

NO

Check for mains voltage at Connector J5 on power board

YES

Reset thermal cut out and find reason for fault

NO

Check mains lead and plug

YES

Check connectors on power board are in correct locations and secure, check fuses (F1 - F4), check voltage on connector J7of power PCB, mains switch on, connectors on rear of control board and continuity of transformer, connector J8-1& 3 (Primary) and connector J9-1 & 2

+3 & 4 (Secondaries).Check voltage on transformer

secondary J9.

BAD

Repair faulty component and test

GOOD

Replace power board and test

NO

Replace control board and test

NO

Return unit for repair

YES

Assemble and test

YES

Perform calibration and performance checks as outlined in Sections 3.0 and

4.0of the Technical Manual before re-instatement of unit

Ref. 185040646 MR730/720/700/480 Technical Manual ¯ Revision F ¯ Issued March 2001