Categories
Practical fault-finding across domestic/commercial and industrial work — switch between them with the tabs.
Contactors & relays
Coils, contacts, chatter, and switching faults.
Motors & overloads
Won't start, tripping overloads, and running faults.
Forward / reverse circuits
Direction control, interlocks, and reversing logic.
Limit switches & sensors
Proximity, photo-eyes, and position switching.
VSDs
Drive faults, start commands, and trip codes.
PLC inputs / outputs
Inputs not reading, outputs on but device dead.
Timers
Delays not timing, contacts not switching.
Heating elements & SSRs
Uneven current, dead banks, stuck solid-state relays.
RCD / RCBO faults
Nuisance tripping and earth-leakage hunting.
General testing
Control voltage, single-phasing, and method.
Lighting
Lights out, flickering, downlights, dimmers and LEDs.
Power points & circuits
Dead GPOs, half-working outlets, and tripping circuits.
Switchboards & safety switches
Nuisance trips, dead circuits, and board faults.
Hot water & heating
No hot water, elements, thermostats and off-peak.
Ovens & cooktops
Not heating, elements, and induction faults.
Fans & ventilation
Ceiling fans, exhaust fans, speed and noise faults.
Smoke alarms
Chirping, false alarms, and interconnect faults.
Outdoor & garden
Outdoor GPOs, garden lighting, sheds and weatherproofing.
Distribution boards
Sub-mains, three-phase boards, busbars and balancing.
Emergency & exit lighting
Exit signs, emergency fittings, batteries and testing.
Data & comms
Data points, patch leads, PoE and structured cabling.
HVAC & air-con
Split systems, ducted units, controls and condensate.