Intercall 600/700 Installation & Operation Guide Issue 4.27 Page 76 of 78
Power Supply Faults
FAULT CAUSE CURE
F18. PSU Yellow LED not illuminated
No mains power connected
Transformer damaged during installation
Check Supply.
F19. PSU Green LED not illuminated 1 Amp fuse blown
PCB damaged during installation
Check fuse.
F20. Master PSU Red LED not flashing
F21. PCB Sounder beeping continuously
Network short
Network Device connections reversed
Flat Battery*
Output Overloaded
PCB damaged during installation
* The Power Supply is not designed to re-charge a completely flat
battery & operate the call system simultaneously. Completely flat
batteries must be charged using a specialist Sealed Lead Acid battery
charger or a power supply which has no external load connected.
Remove or eliminate Network spurs
Use battery charger to re-charge battery or replace battery.
Max Load 100 Current Units per PSU
F22. Master PSU Beeper Sounding once per second
and PSU Yellow LED Not Illuminated
Unit running from back up battery Check mains incoming supply
F23. No output from booster No input connected to booster
No output from master Supply.
Check Yellow & Green LED’s
Check cable from master to booster.
F24. No Output from master power supply Network Cable Short
Network Device connections reversed
PSU Output Power Transistor Damaged
Remove or eliminate Network Spurs
F25. Display text corrupted after download Text corrupted within power supply.
Battery must be connected when downloading
Connect to computer and re-program.
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