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Please keep these operating instructions for future reference and maintenance.
Subject to technical modifications. Diagram is not binding.
25
5.6.
Basic Fault Finding
If the system operates from mains power but when mains power is removed will not
operate from batteries, it is possible that the batteries will require replacement.
There are no user repairable parts.
Fault rectification must only be
carried out by authorised and competent persons.
1. Mains power: Incoming mains supply in the range 230 ±10% V.A.C must be present.
2. Fuses: Refer to section 2.6 – Do not replace fuses without investigating the cause of the failure.
Blown fuses must be replaced with fuses of the correct type and current rating.
3. Battery open circuit voltage; the voltage on each battery when not on charge should be above 12.6 V.D.C.
4. Cable connections; all connections to be secure and show no sign of damage or shorting
5. MCPs; All controllers have green ‘healthy’ indicators –refer to section 2.3 and 2.4
Symptom
Possible cause
Standby LED off, fault
flash (50/50) at MCP
Mains supply failed – check supply, ensure the electrical breaker has not tripped.
Battery Failed. Disconnect the battery and check the open
circuit voltage of each battery is >12.6V (fully charged) or >10.5V
(uncharged). Replace pair of batteries if either is low.
Disconnecting and reconnecting the battery while mains power is applied can
cause a battery fault to be wrongly detected even with a good battery. This fault
is only cleared at the end of the fast-charge period so make take minutes or
hours to clear. To avoid this, connect batteries before connecting mains power.
Standby LED on, brief fault
blinks every 10 seconds
at MCP controller. System
remains operational.
Service due indication (where enabled). Resetting a service due
warning requires an engineer with a SCEPTRE tool.
No operation, No
Leds illuminated.
Mains supply lost and battery low.
Check battery voltage >10.5V each battery. Try ‘battery power
up’ button. Check fuses. Restore the mains supply.
No actuator operation
but actuator LEDs on
PSU illuminated.
Check connection to the actuator and operation of the actuator.
No actuator operation
and actuator LEDs on
PSU not illuminated.
For smoke stacks and similar networked systems, check that another
vent elsewhere is not open and interlocking operation.
Check fuses at PSU and on Power and control board
No response to
Environmental ventilation
controls, but fire
controls operate O.K.
Check mains supply is present – Environmental ventilation
functions can be disabled on mains failure.
Check the rain-sensor input is not active. Allow time
for rain sensors delays to timeout.
Wait for internal timers to timeout, e.g. If day-to-day controls are
operated, the thermostat input is disabled for the occupancy time.
As some lockout timers can be lengthy, it can be useful to reset the
system by removing and re-applying all power to the system.
No power on PER
permanent output
Check all fuses
