The fault code is there.
So is the answer.
You're at the unit, the display says E422, the customer is waiting. teccmate tells you what the code means, what to check in which order and where it's written. From more than 170 knowledge documents, including 31 manufacturer compendiums, and your own company's cases. Right on your phone.
30 days free · Apple Pay, Google Pay or card · Cancel monthly
teccmateOnlineteccmateE422 signals a refrigerant flow fault. Undercharge is the most common cause, but don’t just top up: a blocked EEV triggers E422 as well.
- Check service and expansion valves: fully open, EEV responding?
- Measure pressures and superheat: high superheat with low suction pressure points to undercharge.
- Leak search first, then recharge: document the leak test as required by the F-gas regulation.
Built for the day at the unit. And for everything that follows in the office.
Not an empty chat box. Twelve tools from the fault code to the finished invoice, connected to an AI that understands refrigeration, HVAC, heat pumps and heating.
Fault code in, check steps out
Enter manufacturer, code or symptom. You get the most likely cause, the checking order and the source. No scrolling through PDFs.
The record hangs on the unit
QR sticker on the unit. One scan and your colleague sees history, photos, readings and open items, even on the first visit.
Order out, report back
The office creates and assigns, you document on site, the customer signs on the phone. No more lost paperwork.
Inspections under control
F-gas leak checks and service intervals are planned automatically. What's due is in the calendar, not in someone's head.
Your manuals read along
Upload your own documents, service reports and manufacturer manuals. The AI answers from them and cites the passage.
Photograph the nameplate, done
A photo of the nameplate is enough: manufacturer, model, serial number and refrigerant are recognised and saved as an asset.
Invoice straight from the work order New
Labour, travel and parts are already filled in, prices come from your own catalogue. It is checked before issuing, with a second look by the AI on request. It goes out as a PDF with e‑invoice data.
Commissioning step by step
A guided protocol per system type. At the end, asset record, service entry and maintenance plan are created automatically. Starting with Samsung DVM S.
Work instructions at the push of a button
A solved case becomes a clean guide for the whole team. So the next colleague doesn't start from scratch. In the Professional plan.
A planning board for the whole team New
Work orders, holidays, sick days and due maintenance on one board. Drag jobs to reschedule, every technician sees their day on the phone.
Service contracts that remind themselves New
One contract per customer with its units and interval. teccmate creates the maintenance work orders in time, so no appointment slips through.
Quotes that turn into jobs New
Write a quote like an invoice, with your prices and its own number range. Once the customer accepts, the work order and invoice follow from it.
This is what teccmate looks like.
Real views from the app. Click an image to see it large.
All names, systems and amounts belong to a fictional example company.
Job done, invoice done. New
The technician completes the work order, the office clicks “Create invoice”. teccmate turns it into a finished draft that you only review and send.
- From the work order: labour, travel, parts, customer and site are already filled in.
- Your prices: hourly rate and items come from your service catalogue. The AI writes the wording, it never invents prices.
- A second look: before issuing, teccmate checks the mandatory details under German VAT law and flags anything odd.
- E-invoice included: every invoice is a PDF with ZUGFeRD data (EN 16931), numbered without gaps and locked once issued.
- Send it right away: by email from teccmate, record the payment, cancel cleanly with a credit note if needed.
- Quotes too: same editor, its own number range. Once the customer accepts, one click turns it into a work order and an invoice.
Included in every plan at no extra cost.
Who is where, what is due, who is out. New
Work orders, due maintenance, holidays and sick days on one board. The office plans the week, every technician sees their day on the phone.
- Week and day: one row per person for the week, a time grid for the day. Double bookings stand out at once.
- Drag and drop: move a job to another day or colleague, done. If that colleague is sick or on holiday that day, teccmate tells you.
- Maintenance in view: whatever falls due from maintenance plans and contracts waits next to the board and becomes a work order with one click.
- Absences: technicians report holidays or sick days themselves, the office confirms with one click.
- Service contracts: one contract per customer with its units, interval and scope of work. The maintenance work orders are created on time by themselves.
Included in every plan at no extra cost.
It doesn't replace a master technician. It brings his knowledge where it's missing.
The knowledge in our trade sits in the heads of a few people, and they can't be on every site. teccmate starts with more than 170 knowledge documents, including 31 manufacturer compendiums and learns from real fault patterns from active companies. Your company data stays private: your cases, assets and documents are visible to your team only.
One look, and you know what's happening outside today.
Faults, recently edited assets and ongoing cases on one page instead of three folders and five phone calls. The office sees the status, the technician has everything on the phone, the customer gets the report without asking.
Sign up today, use it at the unit tomorrow.
Sign up
Enter company and email, add Apple Pay, Google Pay or a card, done. You are only charged after 30 days. No appointment, no installation, your access is ready in a minute.
Add assets
Photograph nameplates or import your stock. Print QR stickers and attach them to the units.
Invite the team
Technicians get their access by email and start right from the phone, on site.
One price per month. No surprises.
30 days free, the first charge only comes afterwards. Cancel monthly, no setup fee, no minimum term. All prices net, plus VAT.
- Fault-code assistant & document AI
- QR asset passport & nameplate scan
- Digital work orders with signature
- Maintenance planning & calendar export
- Invoices with e-invoice (ZUGFeRD)
- Planning board with holidays and sick days
- Service contracts & quotes
- All Starter features
- Work-instruction generator
- Complete asset history
- Priority support
- All Professional features
- Own knowledge base & API access
- Multi-site asset histories
- Dedicated contact
Less than one hour of troubleshooting saved per month, and the Starter plan has paid for itself.
Built by people who stand at units themselves.
I built teccmate because the knowledge in our trade sits in the heads of a few people, and they can't be on every site. Every technician should get the answer the most experienced colleague would give. If something is missing or doesn't fit: write to me directly, I read every email myself.
Frequently asked questions
Do I have to pay for the trial?
No. The first 30 days are free. When you sign up you add a payment method, for example Apple Pay, Google Pay or a card. You are only charged after the trial. Cancel before it ends in the customer portal and nothing is charged.
What happens after the 30 days?
Your subscription continues seamlessly and is charged monthly to the payment method on file. You don't need to do anything and your data simply stays. If you don't want to continue, cancel beforehand with one click in the customer portal.
I'm a technician, not a computer person. Will I manage?
Yes. If you can write a message and take a photo, you can use teccmate. Type the fault code, read the answer, done. There's no training course you have to attend first.
Can I write invoices with teccmate?
Yes. Every completed work order turns into an invoice draft with one click, including labour, travel and parts. Prices come from your service catalogue. Standalone invoices without a work order are possible too. Every invoice is a PDF with an e-invoice in ZUGFeRD format and is sent by email straight from teccmate. Invoicing is included in every plan at no extra cost.
Can we plan jobs with teccmate?
Yes. The planning board shows the week or the day for the whole team: work orders, due maintenance, holidays, sick days and other appointments. The office moves jobs by drag and drop, technicians see their own schedule and report absences themselves. Service contracts create the maintenance work orders on time by themselves. Both are included in every plan.
Does the AI see our customer data?
Your documents, assets and cases are visible to your team only. The shared knowledge base consists of manufacturer knowledge and anonymised fault patterns, not your customer data.
Does it work on the phone?
Yes. teccmate is a web app and runs in the browser on phone, tablet and workshop PC, no installation. QR scan and nameplate photo use the phone camera.
How do I cancel?
Any time to the end of the month in the customer portal (app → subscription). You receive a written confirmation by email.
Try it on your
next fault code.
30 days free, first charge only afterwards, set up in a minute.