Dyer Environmental Controls Ltd
RZN 4402/04-K V2 Troubleshooting Guide
Operational faults
Fire alarm interface
:
•
Confirm signal from interface is normally open volt free.
•
1kΩ triggering resistor installed as detailed on previous page.
•
10kΩ end of line resistor installed as detailed on previous page
Smoke detector
:
•
Ensure the 10kΩ end of line resistor is installed as detailed on previous page.
• Turn smoke detector head clockwise until a click is heard and a physical connection is made between head
and base.
Breakglass
:
•
10kΩ end of line resistor installed and connections as detailed on previous page.
•
Confirm the breakglass terminal connector is firmly secured onto the PCB.
• Check external signal fuse is present and has not blown.
Drive
:
• Check MOT terminal connections in the control panel and local connection point.
• Test power supply from terminals A and B in control panel, minimum of 24v DC should be present on operation
(fire).
• If voltage is present on operation and connections are correct, the issue is with the drive(s) and not the controls,
see drive information for assistance.
• If no voltage is present on operation, check 1.6 Amp (4402) / 3.15 Amp (4404) fuse is present and has not blown.
DIP-Switches
:
• For operational set-up (including one-touch reset of system) see information on control panel data sheet.
Dyer Environmental Controls Ltd, Unit 10, Lawnhurst Trading Estate, Cheadle Heath, Stockport, Cheshire SK3 0SD
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www.dyerenvironmental.co.uk +44 (0)161 491 4840 Registered in England 02670985 VAT No. 611329279
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