STEP 2 · THE "REAL GRAPH AUTOPSY" SOCIAL CONTENT ENGINE (ORGANIC SALES)
6 Ready-to-Post "What's the Fault?" Campaigns (LinkedIn, Facebook & Shorts)
How to run each campaign (3x/week): On Day 1, download the telemetry graph plate below and post the "What's the Fault?" Quiz Post on LinkedIn and UK Refrigeration Engineer Facebook groups. Let engineers debate in the comments for 24 hours. On Day 2, record a 60-second screen/phone video using the 60-Second Video Breakdown Script and drop the Comment CTA Link in the first comment.
CAMPAIGN 1 · SLOW REFRIGERANT LEAK vs AMBIENT
Target: Level 2 (£149)
2:00 AM Chiller Alarm — EEV at 100% & Sawtooth Air-Off
Plate:
assets/graph-slow-leak.png
Day 1 LinkedIn / Facebook "What's the Fault?" Quiz Post
🚨 2:00 AM BUREAU ALARM — DO YOU ROLL A £450 VAN OR HOLD?
You’re on the monitoring desk looking at a 4-door dairy multideck (+2.0°C setpoint).
Here’s what the 24-hour controller graph shows:
• Air-Off (blue) is creeping up in a wider sawtooth (+5.8°C peak during afternoon trading)
• Evaporator Coil probe (green) is drifting UPWARD toward Air-Off (widening gap from Pack Suction)
• EEV Opening % is pinned flat at 100% for the last 5 hours
• Pack Suction header is rock-steady at -9.5°C
Helpdesk wants to log it as "warm store ambient — monitor for 24 hours."
What is your diagnosis from the graph, and what instruction do you put on the job sheet? 👇 Drop your call in the comments!
#Refrigeration #CommercialRefrigeration #HVACR #SupermarketRefrigeration #Engineering #RDM #Carel #Danfoss
Day 2 60-Second Video Script + First Comment CTA
[60-SECOND VIDEO SCRIPT — Point at assets/graph-slow-leak.png]
"Yesterday I posted this 2:00 AM multideck trace and asked if you'd hold or roll a van. If you wrote this off as 'warm store ambient', you're about to lose £25,000 of chilled stock tonight.
Look at three traces together:
1. Pack Suction is flat at -9.5°C — so the pack is healthy.
2. EEV Opening is pinned at 100% for 5 straight hours — the controller is begging for liquid refrigerant.
3. Most importantly, the Evaporator Coil trace is drifting UPWARD toward Air-Off. That means high superheat and zero liquid boiling reserve at the exit of the coil.
That is classic refrigerant starvation — either a slow gas leak, flash-gas in the liquid line, or a blocked strainer.
Test yourself on 6 live supermarket traces in our free simulator or grab the free 5-Graph Cheat Sheet at rda-academy.co.uk — link in the first comment!"
[FIRST COMMENT TO PASTE]
📥 Grab the Free 3-Page "5 Supermarket Telemetry Graphs Every Engineer Misreads" Cheat Sheet PDF (or test yourself on the live simulator) here: https://rda-academy.co.uk/#free-guide
CAMPAIGN 2 · TRANSCRITICAL CO₂ PACK HUNTING
Target: Level 3 (£199.99) & B2B
Transcritical CO₂ Pack Hunting — HPV vs Flash-Gas Bypass Valve
Plate:
assets/co2-graph-1-hpv-hunting.png
Day 1 LinkedIn / Facebook "What's the Fault?" Quiz Post
⚡ TRANSCRITICAL CO₂ (R744) BRAIN TEASER — WHY ARE ALL 16 CASES HUNTING AT ONCE?
16 medium-temperature cabinets on MT Suction Group 1 start logging high-temperature alarms and violent EEV swings (15% ↔ 98% every 3 minutes).
Before sending an engineer to strip cabinet EEVs on the shop floor, you pull the CO₂ Booster Pack trend above:
• Gas Cooler Pressure (HPV) is swinging 74 bar ↔ 96 bar
• Receiver Pressure is oscillating 33 bar ↔ 43 bar (180° out of phase with the HPV!)
• MT Pack Suction header is swinging -3°C ↔ -12°C every 3 minutes
What is happening between the High-Pressure Valve (HPV) and the Flash-Gas Bypass Valve (FGBV), and how do you stabilise this pack? 👇
#CO2Refrigeration #R744 #TranscriticalCO2 #SupermarketRefrigeration #RefEng #HVACR #RDA
Day 2 60-Second Video Script + First Comment CTA
[60-SECOND VIDEO SCRIPT — Point at assets/co2-graph-1-hpv-hunting.png]
"Here's why you ALWAYS check the common Pack Suction trace before condemning a cabinet expansion valve.
On this Transcritical CO2 booster pack, an overly aggressive HPV PID gain opens the High-Pressure Valve too fast. That dumps a slug of flash gas into the intermediate receiver.
The Flash-Gas Bypass Valve (FGBV) panics and opens to 92% to vent excess receiver pressure straight into the MT suction header — spiking suction pressure up to -3°C.
Then the HPV slams shut, receiver pressure collapses, and all 16 cabinet EEVs hunt wildly trying to chase a moving suction target.
We cover all 6 Transcritical CO2 pack instability signatures in Level 3 at rda-academy.co.uk — try Scenario 6 in our free live simulator via the link in the comments!"
[FIRST COMMENT TO PASTE]
⚡ Try Scenario 6 (Transcritical CO₂ Pack Instability) live in our free interactive simulator or download the 5-Graph Cheat Sheet PDF: https://rda-academy.co.uk/#simulator
CAMPAIGN 3 · VERTICAL PROBE SPIKE vs REAL WARM-UP
Target: Level 1 (£29) & Level 2 (£149)
Vertical -28°C Spike to +14°C in 60 Seconds — Roll a Van or Hold?
Plate:
assets/graph-3.png
Day 1 LinkedIn / Facebook "What's the Fault?" Quiz Post
📈 60-SECOND TRIAGE TEST: CAN AIR CHANGE TEMPERATURE BY 25°C IN ONE MINUTE?
Across UK FM helpdesks and monitoring bureaus, this single misread accounts for thousands of wasted £450 emergency call-outs every year.
When you open a 24-hour controller graph and see a vertical needle spike on the Air-Off probe—while the Air-On and Evaporator Coil traces stay completely flat—what physical principle proves it is NOT a genuine refrigeration breakdown?
Bonus question for Desk Engineers: What can you adjust remotely in the controller parameters to keep the cabinet running safely until a planned daytime probe swap? 👇
#Refrigeration #DeskEngineer #BureauDiagnostics #ApprenticeEngineer #SupermarketCooling
Day 2 60-Second Video Script + First Comment CTA
[60-SECOND VIDEO SCRIPT — Point at assets/graph-3.png]
"The rule is called Thermal Inertia. Food, steel cases, and moving air have thermal mass — they warm up and cool down along curves over 15 to 60 minutes, never in a vertical 60-second straight line.
When one probe jumps 20 degrees vertically and snaps straight back while the Return Air and Evaporator Coil traces don't budge, you are looking at a high-resistance thermistor joint or moisture in the probe plug.
Instead of rolling a van at 1:00 AM for £450, a trained Desk Engineer temporarily shifts control weighting toward Air-On and books a routine daytime probe swap.
Download our free 5-Graph Cheat Sheet PDF at rda-academy.co.uk!"
[FIRST COMMENT TO PASTE]
📥 Download the Free 3-Page "5 Supermarket Telemetry Graphs Every Engineer Misreads" Cheat Sheet PDF: https://rda-academy.co.uk/#free-guide
CAMPAIGN 4 · 06:15 AM DELIVERY DOOR USAGE vs BREAKDOWN
Target: Level 2 (£149) & B2B Managers
06:15 AM Supermarket Delivery vs Genuine Breakdown (The 30-Minute Rule)
Plate:
assets/graph-1.png
Day 1 LinkedIn / Facebook "What's the Fault?" Quiz Post
🚪 06:15 AM HIGH-TEMP ALARM ON WALK-IN CHILLER (+10.4°C) — DISPATCH OR CALL STORE?
Every morning between 05:30 and 07:30, monitoring bureaus get flooded with walk-in chiller high-temperature alarms.
Look at the trace:
1. Return Air (Air-On) spikes sharply first
2. Air-Off follows 5 minutes later
3. BUT look at the green Evaporator Coil trace: it stays freezing cold at -5.8°C and the EEV opens to 95%
Why is the Evaporator Coil trace your best friend here, and how does the "30-Minute Sustained Fault Rule" save £450 on this ticket? 👇
#FacilitiesManagement #Refrigeration #SupermarketMaintenance #EnergyManagement #ColdChain
Day 2 60-Second Video Script + First Comment CTA
[60-SECOND VIDEO SCRIPT — Point at assets/graph-1.png]
"When the morning delivery cages roll in and the chiller door is wedged open for 35 minutes, warm store air hits the Return grille first — so Air-On spikes.
How do you prove in 10 seconds that the refrigeration plant hasn't broken down? Look at the Evaporator Coil trace. It's sitting at -5.8°C and the expansion valve is at 95%. The plant is working flat-out removing heat!
Pick up the phone, ask the duty manager to shut the walk-in door, and watch the graph pull straight back to +2°C in 20 minutes. Zero van roll, £450 saved.
Train your bureau or test yourself on our free simulator at rda-academy.co.uk!"
[FIRST COMMENT TO PASTE]
⚡ Try the Delivery Door vs Breakdown scenario in our free live simulator: https://rda-academy.co.uk/#simulator
CAMPAIGN 5 · HIGH-AMBIENT CO₂ GAS COOLER APPROACH
Target: Level 3 (£199.99)
High-Ambient CO₂ Gas Cooler Approach Drift (34°C Summer Peak)
Plate:
assets/co2-graph-2-gas-cooler-approach.png
Day 1 LinkedIn / Facebook "What's the Fault?" Quiz Post
☀️ 32°C AMBIENT & TRANSCRITICAL CO₂ PACK IN ALARM — WHAT SHOULD YOUR GAS COOLER APPROACH BE?
On a healthy Transcritical CO₂ (R744) pack running at 100% EC fan speed in transcritical mode, the Gas Cooler Outlet Temperature should sit within 2 K to 3 K of External Ambient.
In the trend above:
• External Ambient is 31°C
• Gas Cooler Outlet is 40.5°C (a 9.5 K approach!)
• Flash-Gas Bypass Valve (FGBV) is choked above 85% and MT suction is losing control
Why does every +1 K of extra Gas Cooler outlet temperature above 31°C destroy your liquid mass fraction and flood the receiver with flash gas? 👇
#CO2 #R744 #SupermarketRefrigeration #Transcritical #Cooling #HVACR
Day 2 60-Second Video Script + First Comment CTA
[60-SECOND VIDEO SCRIPT — Point at assets/co2-graph-2-gas-cooler-approach.png]
"Above the 31.1°C critical point of CO2, gas cooler outlet temperature dictates enthalpy entering the High-Pressure Valve.
When fouled fins, failed EC fans, or scaled adiabatic spray pads push your Gas Cooler Approach from 2 K up to 9.5 K, the enthalpy entering the HPV skyrockets.
Instead of 65% liquid and 35% flash gas in the receiver, you suddenly get 60%+ vapour! The Flash-Gas Bypass Valve hits 85%+, MT compressors choke on flash gas, and display cases warm up.
Check out all 6 CO2 instability modules in Level 3 at rda-academy.co.uk!"
[FIRST COMMENT TO PASTE]
🔬 Explore Level 3 (Advanced Diagnostics & Transcritical CO₂ Pack Instability) + Free Module 1 Preview here: https://rda-academy.co.uk/#classroom
CAMPAIGN 6 · ICED EVAPORATOR vs GAS SHORTAGE
Target: Level 1 (£29) & Level 2 (£149)
Crushed Air-On / Air-Off ΔT & -15°C Coil — Ice Block vs Gas Leak
Plate:
assets/graph-4.png
Day 1 LinkedIn / Facebook "What's the Fault?" Quiz Post
❄️ THE CLASSIC PART-SWAPPER TRAP: HIGH CASE TEMP (+8°C), SO IS IT SHORT OF GAS?
An engineer gets sent to a chiller running at +8°C. Without looking at the 24-hour controller graph, they hook up gauges, see low suction, and dump refrigerant into the system.
One glance at the telemetry graph would have stopped them in 10 seconds:
• Air-Off has climbed to +8.2°C and crushed right up against Air-On (+8.6°C)
• Evaporator Coil probe has plunged to -15.4°C!
• EEV Opening % has throttled DOWN to 21%
Why does a diverging Coil vs Air-Off trace prove the coil is a solid block of ice (or the evap fans have failed), and what remote fix can the bureau run first? 👇
#RefrigerationEngineer #HVACR #Troubleshooting #SupermarketCooling #RDA
Day 2 60-Second Video Script + First Comment CTA
[60-SECOND VIDEO SCRIPT — Point at assets/graph-4.png]
"Here is the fastest way to tell a refrigerant leak apart from an iced evaporator coil:
In a refrigerant leak, the Evaporator Coil warms UP toward Air-Off and the EEV pins at 100%.
In an iced coil or fan failure, the exact opposite happens: the Evaporator Coil plunges freezing cold (-15°C), the EEV throttles DOWN to 20% on low superheat, and Air-Off climbs up to meet Air-On because zero air can pass through the honeycomb and coil block!
Before rolling a van, a Desk Engineer can trigger a manual de-ice cycle remotely.
Grab our free 5-Graph Cheat Sheet PDF at rda-academy.co.uk!"
[FIRST COMMENT TO PASTE]
📥 Download the Free 5-Graph Diagnostic Cheat Sheet PDF here: https://rda-academy.co.uk/#free-guide