INTERACTIVE DIAGNOSTIC SANDBOX · TRY BEFORE YOU ENROL

Can You Read the Story in the Graph?

An alarm only tells you what happened—the 24-hour trend graph tells you why. Select any of the 5 real supermarket case scenarios below, scrub your mouse across the 24-hour trace to inspect probe values, and test your remote diagnosis.

🖱 Hover across graph to inspect 15-min telemetry intervals

Timestamp 13:15

Air Off (Ctrl) +1.6 °C

Air On (Return) +5.1 °C

Evap Coil -5.8 °C

Pack Suction -9.5 °C

EEV Opening 46%

Air Off (Discharge Air) Air On (Return Air) Evaporator Coil (°C) Pack Suction Header (SST) Scheduled Defrost Window

NORMAL OPERATION

Scenario 1: Healthy Multideck Chiller

⚡ Live Triage Challenge — What's Your Call?

📊 Actual Course Telemetry Reference Plates (Click any graph to enlarge): Included in Flagship Course 2: Remote Engineering & Introduction to Graph Analysis

1. Healthy Case & Defrost Baseline

2. Probe Fault & Sensor Drop-Out

3. Door Usage vs Heat Ingress

4. Iced Coil vs Valve Starvation

5. Slow Leak & Rising Superheat

6. L3: CO₂ HPV & FGBV Hunting

7. L3: CO₂ Gas Cooler Approach

8. L3: CO₂ Receiver Collapse

9. L3: CO₂ Parallel Compression

10. L3: CO₂ Booster Cascade

📥 FREE 3-PAGE PDF CHEAT SHEET · SAVES £450+ PER AVOIDED FALSE DISPATCH

The 5 Supermarket Telemetry Graphs Every Engineer Misreads — And How to Spot a £450 False Call-Out in 60 Seconds

Across UK supermarkets and FM estates, 22% to 30% of emergency refrigeration call-outs are triggered by misread defrost recoveries, delivery door openings, or faulty thermistors. Download our illustrated 3-page reference guide with real RDM, Carel & Danfoss traces:

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Fault 1: Air-Off Probe Drop-Out vs Real Case Warm-Up — Spot zero thermal inertia vertical spikes in 5 seconds (graph-3.png).
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Fault 2: Morning Delivery Door Usage vs Breakdown — Apply the 30-Minute Sustained Fault Rule with cold coil verification (graph-1.png).
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Fault 3: Slow Refrigerant Leak & EEV Pinned at 100% Starvation — Catch sawtooth decay and rising superheat before £25k stock loss (graph-slow-leak.png).
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Fault 4: Iced Evaporator & Failed Post-Defrost Pull-Down — Crushed Air-On/Air-Off ΔT with a -15°C coil (graph-4.png).
⚡
Fault 5: Transcritical CO₂ (R744) HPV & Flash-Gas Bypass Hunting — 180° counter-phase pack header oscillation (co2-graph-1-hpv-hunting.png).

✔ Instant 3-Page Executive PDF (778 KB) ✔ Includes At-a-Glance Bureau Triage Matrix ✔ Pin Above Desk or Keep in Van Tablet

Instant PDF Download 100% Free Guide

Get the 5-Graph Cheat Sheet Now

Enter your details below to unlock the 3-page PDF immediately and receive our weekly "What's the Fault?" telemetry breakdown.

🔒 Zero spam. Unsubscribe anytime. Lead enquiries also routed to info@rda-academy.co.uk.

3-LEVEL STRUCTURED DIAGNOSTIC PATHWAY + BESPOKE CORPORATE TRAINING

Choose Your RDA Training Level

A complete progression from Level 1 (Beginners + Intro to Reading Graphs) to Level 2 (Desk Engineers & Monitoring Bureau Staff) and Level 3 (Advanced Diagnostics & Transcritical CO₂ Pack Instability)—plus bespoke courses tailored to your business's exact controller estate.

Level 1 Refrigeration Basics & Intro to Graphs

LEVEL 1 · BEGINNERS & INTRO TO GRAPHS

For Beginners, Apprentices, New Starters & Helpdesk Staff

Level 1: Commercial Refrigeration Basics & Introduction to Reading Graphs

Master how commercial refrigeration moves heat in a sealed loop, identify all 8 core components on real site equipment, and complete our dedicated Introduction to Refrigeration Diagnostics & Reading Telemetry Graphs (Air-Off vs Air-On, valve % and normal defrost spikes).

“Go from "what's a TEV?" to reading a real case graph — in one afternoon.”

✔ Name all 8 core parts of a supermarket refrigeration loop on real kit
✔ Read Air-On vs Air-Off and valve % on a controller trend
✔ Tell a normal defrost spike from a real fault
✔ Talk to engineers and site managers with confidence

🎬 7 Modules (Inc. Graph Intro)

📘 PDF Handbook + Slide Deck

✅ Graded Quizzes (75% Pass)

🎓 Level 1 RDA Certificate

M1: How Refrigeration Moves Heat & 8-Part Loop06:12
M2: High Side — Compressor, Condenser, Receiver & Drier05:35
M3: Liquid Line — Sight Glass, Solenoid, TEV & EEV04:29
M4: Low Side — Evaporator, Fans & The Three Lines03:56
M5: Complete Cycle Wheel & 6-Photo Component ID09:01
M6: Guided Revision & Component Self-Test06:08
M7 (NEW): Intro to Refrigeration Diagnostics & Reading GraphsGraph Intro

★ LEVEL 2 · DESK & BUREAU

LEVEL 2 · DESK ENGINEERS & BUREAU STAFF

For Desk Engineers, Remote Monitoring Bureau Staff & Triage Analysts

Level 2: Remote Refrigeration Engineering & Bureau Graph Diagnostics

Built specifically for Desk Engineers and Monitoring Bureau Staff. Decode 24-hour RDM, Carel, and Danfoss pack & case trend logs, separate door usage and defrosts from real breakdowns, catch slow leaks and iced coils early, and eliminate £450 wasted call-outs.

“Stop sending vans to faults you could have solved from the desk.”

✔ Triage RDM / Carel alarms using the 24-hour trend first
✔ Separate controller and sensor issues from genuine mechanical faults
✔ Write clear call-out notes an engineer can act on
✔ Spot slow leaks, iced coils and stuck valves before the stock is lost

📊 7 Bureau Triage Modules

📘 Bureau Handbook + Slides

🧠 60-Question Assessment

🏆 Level 2 RDA Certificate

M1: Role of the Desk Engineer & 30-Minute Sustained Fault RuleBureau Core
M2: Probe Drop-Outs, Sensor Spikes & Zero Thermal InertiaTriage
M3: Door Usage, Morning Deliveries & Self-Correcting ExcursionsTriage
M4: Genuine Heat Ingress, Night Blinds & Split Evaporator CoilsFault
M5: Iced Evaporators, Fan Failures & Slow Defrost RecoveryFault
M6: Slow Refrigerant Leaks & EEV Pinned at 100% StarvationMastery
M7: Pack vs Case Correlation & 5-Point Engineer Handover NotesMastery

⚡ LEVEL 3 · ADVANCED CO₂

Level 3 Advanced CO2 Pack Instability Course

LEVEL 3 · ADVANCED & CO₂ PACK INSTABILITY

For Senior Desk Engineers, Bureau Leads & Pack Specialists

Level 3: Advanced Diagnostics, Transcritical CO₂ Pack Instability & Complex Issues

Master complex supermarket faults and Transcritical R744 (CO₂) Booster Pack Instability: High-Pressure Valve (HPV) & Flash-Gas Bypass Valve (FGBV) hunting, gas-cooler approach drift, parallel compression short-cycling, LT-to-MT booster cascades, and heat-reclaim shockwaves.

“Diagnose transcritical CO₂ pack instability from the trend, before it trips.”

✔ Read HPV hunting, gas-cooler approach and FGBV collapse patterns
✔ Trace suction cascades across a parallel compressor pack
✔ Separate heat-reclaim effects from real faults
✔ Lead escalations and mentor desk engineers on complex packs

🔬 6 Advanced CO₂ Modules

📈 6 CO₂ Pack Telemetry Plates

📘 Advanced PDF Handbook & Deck

🎖 Level 3 Master Certificate

M1: Transcritical & Subcritical CO₂ (R744) Booster ArchitectureCO₂ Core
M2: CO₂ Pack Instability — HPV vs Flash-Gas Bypass (FGBV) HuntingInstability
M3: High-Ambient Gas Cooler Approach Drift & Adiabatic FaultsTranscritical
M4: Parallel Compression (IT), Ejectors & Handover HuntingAdvanced
M5: LT-to-MT Booster Cascades, Suction Floodback & Low SuperheatComplex
M6: Heat Reclaim 3-Way Valve Shockwaves & Multi-Fault ForensicsMastery

🏢 BESPOKE & TAILORED CORPORATE TRAINING · PRICED TO SUIT YOUR BUSINESS

Need a Custom Course Built Around Your Exact Controller Estate & SOPs?

Alongside discounted B2B multi-seat access for Level 1, Level 2 (£149.00 individual), and Level 3 (£199.99 individual), we design and build bespoke training courses tailored to your business's specific needs—using your own store controller exports, CO₂ pack architectures, alarm escalation thresholds, and bureau workflows, priced accordingly via tailored quote.

✔ Custom RDM / Carel / Danfoss Store Exports ✔ Bespoke Transcritical CO₂ Pack Modules ✔ Volume B2B Discounts on Levels 1, 2 & 3 ✔ Custom Bureau SOP & Call-Out Triage Playbooks

B2B Discounts & Bespoke Pricing

Tailored Corporate Quote

Tell us your team size, which levels you need (Level 1, 2, or 3), or what bespoke topics you want built—and we will price a package to match.

✉ corporate@rda-academy.co.uk

WHAT YOU'LL BE ABLE TO DO

Read the graph before you send the van

Most refrigeration courses teach the practical F-Gas handling skills you need on site. RDA teaches the other half: diagnosing supermarket faults from the controller trend. It's built for desk engineers, monitoring bureaus and the engineers they dispatch.

📈

Read any case trend

Know what Air-On, Air-Off, evaporator, valve % and defrost lines are telling you, and what "normal" looks like.

🧭

Triage from the desk

Decide whether to dispatch, reset remotely or monitor, and back it up with evidence from the graph.

🧊

Name the fault signature

Slow leaks, iced coils, stuck solenoids, failed fans, sensor drift. Recognise each one from its shape.

⚙️

Stabilise CO₂ packs

(Level 3) Read HPV, gas-cooler and flash-gas behaviour on transcritical systems.

Which level is right for you?

	Level 1 Beginners	Level 2 Desk & Bureau	Level 3 Advanced CO₂
Best for	Apprentices, new starters, helpdesk	Desk engineers, bureau analysts	Senior desk engineers, pack specialists
Prior knowledge	None	Level 1 or field experience	Level 2 or equivalent
You'll leave able to	Read a basic case graph	Triage alarms remotely	Diagnose CO₂ pack instability
Free Module 1 preview	✔	✔	✔
PDF handbook + slides	✔	✔	✔
Graded quizzes (75% pass)	✔	✔	✔
RDA certificate (verifiable ID)	✔	✔	✔
Accredited F-Gas qualification	✖ (complements it)	✖ (complements it)	✖ (complements it)
Price	£29	£149	£199.99

For context, a classroom City & Guilds 2079 F-Gas Cat 1 course typically costs around £1,100–£1,375 + VAT for 4–5 days. RDA doesn't replace that legal qualification. It's self-paced diagnostics training you can take alongside it, from £29.

TRY BEFORE YOU BUY

Module 1 of every level and the fault simulator are free

No card needed. See exactly how the course teaches before you decide.

Try the free simulator →

COMPLETE 3-LEVEL COURSE PORTAL · ALL COURSES LIVE ON WEBSITE

Interactive Course Player, Module Reader, Handbooks & Assessments

Switch between Level 1 (Beginners + Intro to Graphs), Level 2 (Desk Engineers & Bureau Staff — £149.00), and Level 3 (Advanced CO₂ Pack Instability — £199.99) below to watch the lectures, study every module, download the PDF handbooks and slide decks, and take each level's graded assessment.

LEVEL 1 · BEGINNERS & INTRO TO GRAPHS

Level 1: Commercial Refrigeration Basics & Introduction to Diagnostic Graphs

Currently Playing: Level 1 Full HD Lecture — How Refrigeration Moves Heat, The 8-Part Sealed Loop & Intro to Reading Telemetry Graphs.

📦 Course Study Pack (Handbook PDF, Slide Deck & Official Certificate Template):

📖 Interactive Module Reader — Module 1 Free Preview · Modules 2+ Student Portal:

🔓 MODULE 1 FREE PREVIEW

🧠 Live Level Assessment (5 Questions) PASS MARK: 75%

ENTERPRISE, SUPERMARKET & FM HELPDESK PORTAL

Calculate Your Team's Call-Out & Stock-Loss ROI

A single unnecessary emergency refrigeration call-out costs £350–£600. A single missed freezer failure costs £24,000–£35,000 in condemned stock (Tesco Romford / M&S Walton). See how fast an RDA team licence pays for itself.

Configure Your Estate or Monitoring Team

Engineers / FM Helpdesk / Bureau Analysts to Train 15 Staff

Monthly Refrigeration Alarm / Breakdown Call-Outs 120 / mo

Average Cost per Unnecessary / Repeat Engineer Dispatch £450

Projected Reduction in False / Repeat Call-Outs via RDA Triage 22%

💡 Why B2B Teams Choose RDA: Includes Purchase Order (PO) invoicing, cohort completion reporting (whilst keeping individual pre-quiz survey answers confidential), and optional custom telemetry workshops using your own RDM / Carel / Danfoss store trends.

Projected Annual Call-Out Savings (Excl. Stock Saved)

£142,560

317 dispatches/yr

Avoided Wasted Call-Outs

9 Days

Estimated Payback Period

4,032%

12-Month Net Training ROI

£24k–£35k

Saved per Prevented Store Loss

Recommended Corporate Package:
B2B Multi-Seat Discount on Level 2 (£149.00) & Level 3 (£199.99) — Contact for Tailored Quote

✉ corporate@rda-academy.co.uk

EMPLOYER-VERIFIABLE CREDENTIALS · CPD READY

Official Numbered RDA Certificates of Completion

Every engineer, apprentice, or bureau analyst who passes all module assessments with at least 75% earns an official numbered RDA Certificate of Completion that employers and clients can verify online.

Level 1 Certificate (Beginners)

Level 2 Certificate (Desk & Bureau)

Level 3 Certificate (Advanced CO₂)

🔒 LIVE CREDENTIAL REGISTRY LOOKUP

Verify an RDA Certificate ID

Enter a certificate serial number below or click a specimen ID to test instant employer verification:

Try Specimen IDs:

INDIVIDUAL COURSE PRICING & TAILORED B2B / BESPOKE QUOTES

Invest in Diagnostic Mastery

Clear individual pricing for self-paced engineers, plus discounted B2B multi-seat packages and custom courses tailored to your business's exact needs. Toggle GBP (£) or USD ($) in the top bar.

Level 1 · Beginners & Graph Intro

£29.00

For Individuals · B2B discount via quote

Commercial Refrigeration Basics + Intro to Reading Graphs
Built for Beginners, Apprentices & New Starters
7 Modules (Cycle Basics + Telemetry Graph Intro)
Downloadable Level 1 Handbook PDF & Slide Deck
Official Numbered Level 1 RDA Certificate

DESK & BUREAU STANDARD

Level 2 · Desk Engineers & Bureau Staff

£149.00

For Individuals · B2B discount available (contact for quote)

Remote Refrigeration Engineering & Bureau Graph Diagnostics
7 Deep-Dive Supermarket Telemetry Triage Modules
Decode Probe Faults, Door Usage, Ice & EEV Starvation
Level 2 Bureau Handbook PDF, Slides & 60-Question Pool
B2B Customers: Discounted multi-seat rates via tailored quote

ADVANCED CO₂ MASTERCLASS

Level 3 · Advanced & CO₂ Pack Instability

£199.99

For Individuals · B2B discount available (contact for quote)

Advanced Diagnostics & Transcritical CO₂ Pack Instability
HPV & Flash-Gas Bypass Valve (FGBV) Hunting Forensics
Gas Cooler Approach, Parallel Compression & LT/MT Cascades
6 CO₂ Telemetry Reference Plates, Handbook PDF & Slides
B2B Customers: Discounted multi-seat rates via tailored quote

B2B Discounts & Bespoke Courses

Tailored Quote

Multi-seat B2B discounts & custom-built business courses

Discounted B2B Rates on Level 1, Level 2 & Level 3
Tailored & Bespoke Courses built for your business's needs
Customised to your controllers (RDM, Carel, Danfoss, Epta, CO₂)
Priced accordingly based on scope, estate & team size
Dedicated PO / VAT Invoicing via corporate@rda-academy.co.uk

BUILT BY WORKING REFRIGERATION ENGINEERS

Founded by Jamie Davies-Evans

The Refrigeration Diagnostics Academy (RDA) was founded by Jamie Davies-Evans (Senior Commercial Refrigeration Engineer, Gower Refrigeration, South & West Wales) to solve the biggest skills gap in the UK and global cooling industry: the chasm between textbook refrigeration theory and real-world supermarket telemetry diagnostics.

Every graph, component walkthrough, and fault signature inside RDA is drawn from real multi-compressor packs, display multidecks, walk-in freezers, and electronic controller trends—so you learn how to find the right fault first time, protect food stock, and eliminate repeat call-outs.

✉ Student Support: info@rda-academy.co.uk 🏢 Enterprise & FM: corporate@rda-academy.co.uk

Field + Remote

Zero Fluff

Plain-English visuals and real trend logs instead of dry academic equations

Privacy First

Pre-quiz learner survey data is never shared with your employer

UK & Global

Applicable to RDM, Carel, Danfoss, and Emerson/Copeland estates worldwide

Frequently Asked Questions

Is this an accredited F-Gas qualification?

No. RDA courses are CPD-style diagnostics training with an RDA certificate you can verify online. Legally handling refrigerant in the UK still needs an F-Gas qualification such as City & Guilds 2079. RDA teaches the diagnostic and graph-reading skills those courses do not focus on.

Which level should I start with?

New to refrigeration? Start with Level 1. If you already work on site or on a monitoring desk, start with Level 2. Level 3 is for people already comfortable triaging alarms who now deal with transcritical CO₂ packs. Module 1 of each level is free, so try it first.

How long do I get access, and can I go at my own pace?

The courses are fully self-paced and online. You can study on a phone, tablet or desktop and pick up where you left off.

Which controllers and monitoring systems are covered?

The examples use typical UK supermarket telemetry (RDM and Carel-style trends). Bespoke courses can be built around your own estate exports. Email corporate@rda-academy.co.uk.

Do I need prior refrigeration experience for Course 1 (Refrigeration Basics)?

No prior refrigeration, tools, or engineering maths experience is required for Course 1. It is built from the ground up for apprentices, FM helpdesk operators, store maintenance staff, and complete beginners. (Hands-on work on pressurised or live electrical equipment is strictly for qualified engineers.)

How do the quizzes and 75% pass mark work?

Each quiz draws 4 random multiple-choice questions from a 12-question bank (36 questions in Course 1; 60 questions across 5 quiz banks in Course 2). You need 3 out of 4 (75%) to pass, and you get unlimited retakes with fresh questions on every attempt.

Is my pre-quiz form information shared with my employer?

Never. Before each quiz, we ask for your Name, Company, Experience Level (Beginner, Intermediate, Senior), and Country. This information is strictly confidential and collected purely for internal RDA analytics so we can tailor our courses to our participants.

Can our company pay via Purchase Order (PO) and BACS invoice?

Yes. For B2B team cohorts (5, 10, 25, or 100+ seats), email corporate@rda-academy.co.uk or use the B2B quote button above to receive a formal VAT/PO invoice with instant seat provisioning.

Stop Swapping Parts. Master Commercial Refrigeration & Telemetry Graphs.