Trouble

Probable Cause

Remedy

ALL CONTROL PANEL

E. Flat cable connected between

E. Check cable for pinched or

SWITCHES NOT OPERATING.

control switch module and

broken wire condition and repair

(cont’d)

master circuit board pinched

or replace as necessary.

 

and shorted out or broken wire

 

 

in cable.

 

F.Master circuit board not operating properly.

F.Replace master circuit board.

CONTROL PANEL SWITCHES

A.

Not pressing and holding

A. Press and hold ‘‘SECURITY

CANNOT BE DEACTIVATED.

 

‘‘SECURITY SWITCH’’ for

SWITCH’’ for 3-seconds to

 

 

3-seconds to deactivate

deactivate control switches.

 

 

control switches.

 

 

B.

‘‘SECURITY SWITCH’’

B. Replace control panel switch

 

 

inoperable.

module.

 

 

 

 

PARTIAL MESSAGE OR DULL

A.

Extremely low voltage.

A. Upgrade voltage.

(POORLY ILLUMINATED)

 

 

 

DISPLAY.

 

 

 

 

 

 

 

ONE OR MORE FAULT

A. Flat cable not properly

MESSAGES NOT

connected to fault message

OPERATING.

module or master circuit

 

board.

 

B. Flat cable connected between

 

fault message module and

 

master circuit board pinched

 

and shorted out or broken wire

 

in cable.

A.Properly connect flat cable to fault message module or master circuit board.

B.Check cable for pinched or broken wire condition and repair or replace as necessary.

C.External sensing device failing to signal master circuit board which in turn signals fault message display.

C.Replace or repair external sensing device.

D. External sensing devices cable D.

Make sure external sensing

connectors not securely

devices cable connectors are

connected to master circuit

securely connected to master

board connectors.

circuit board connectors.

E.Disconnected or broken wire between master circuit board connector and external sensing device.

E.Connect or repair wire between master circuit board connector and external sensing device.

F.

Master circuit board not

F.

Replace master circuit board.

 

operating properly.

 

 

G.

Fault message display module

G.

Replace fault message display

 

not operating properly.

 

module.

 

 

 

 

ALL FAULT MESSAGES NOT A. No electrical power to Unit.

OPERATING.

B. Flat cable not properly connected to fault message module or master circuit board.

A.Connect electrical power to Unit.

B.Properly connect flat cable to fault message module or master circuit board.

C.Flat cable connected between fault message module and master circuit board pinched and shorted out or broken wire in cable.

C.Check cable for pinched or broken wire condition and repair or replace as necessary.

326142000

62

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Cornelius 326142000 service manual Control Panel Switches, Cannot be Deactivated, Partial Message or Dull, Messages not

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