The Supco RO Series RelayOverload Combo (RO22/RO42/RO62/RO82) is a fair dinkum plug-and-play start solution for single-phase refrigeration compressors. Built for licensed HVAC/R techs and apprentices, it snaps on quick, protects the start winding, and gets you off the roof fasterno worries.

Key Features & Benefits

• Pre-wired relay + overload: Minimal terminations = faster swaps and fewer wiring errors on hot, dusty sites.
• Works with or without a start capacitor: One part covers multiple compressor setupscuts van stock and guesswork.
• Locked-rotor protection: Built-in overload prevents start-winding burnout when motors hang at LRA.
• Snap-on bracket: Quick, secure mountingeven when youre on a ladder in 40 C, its a bloody good time-saver.
• UL Recognized: Recognised safety compliance for easy sign-off on residential and light commercial jobs.
• 230 VAC models with clear HP ranges: Pick the right RO model for clean starts and fewer call-backs.

Why This Product Matters

Hot Brisbane rooftop, unit short-cycling, client breathing down your neckyou know the drill. Weve dropped an RO42 on a caf coldroom before lunch, pressed the thermostat, and she fired first go. Thats the point: reliable starts, protected windings, and less downtime. If youre matching across systems or replacing failed start gear, browse the relay overload range to confirm your HP/amps in one hit.

Pro Tip

Isolate power and let the compressor cool before fitting. Heat-soaked overloads can nuisance-tripwaiting a few minutes helps the RO seat properly and saves a why wont it start? headache. For safe isolation practices, see Safe Work Australia.

Compatibility & System Info

• Supply: 230 VAC, single-phase
• Refrigerants: R32, R410A, R134a (typical AU service work)
• Start capacitor: optional (RO series operates with or without)

Local Trade Context

From Darwin humidity to Tassie winters, these Supco RO units cop the lot and keep on. Less mucking about, more reliable startstoo easy.

Whats Included

• 1 Supco RelayOverload Combo (select RO22 / RO42 / RO62 / RO82)
• Snap-on mounting bracket (integrated)
• Factory pre-wired terminals

Specifications

Warranty & Returns

Backed by manufacturer warranty. 30-day returns if unused in original packagingshell be right if you need to swap.

FAQs

• Which RO model do I choose? Match the compressor nameplate HP/run amps. If unsure, check our relayoverload options.
• Do I need a start capacitor? Not necessarilyRO units are designed to run with or without a start cap.
• What about diagnostics? Use a quality manifold/vacuum setup. Start at Refrigerant & Digital Manifold Gauges.

Related Products

• Run Capacitors (450 V P2) Handy when the caps out of spec and you want fresh starts to stick.
• Fieldpiece Digital Manifolds Faster charge/diagnostic checks with logged data.
• Supco SPP Hard-Start Kits Extra kick for tough compressors or marginal supply.