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@ -223,7 +223,23 @@ Other:
| EEVP | EEV position | | EEVP | EEV position |
| HP | heat pump | | HP | heat pump |
## Appendix B: Diagnostic and status messages ## Appendix B: LEDs
**LEDs allow you to make rapid diagnostics without connecting a serial console or a Service Display. **
| LED | description |
| ------------- | ------------- |
| **EEV_opening** | EEV is opening |
| **EEV_closing** | EEV is closing |
| **EEV_fast** | EEV mode is "fast" (non-precise) |
| **485_RX** | 485 transceiver is in listening state |
| **485_TX** | 485 transceiver transmits a reply |
| **Manual mode** | EEV in a manual mode |
| **LSC: error** | Last stop was caused by an error. If you see this LED ON, it's a reason to connect either console or Service Display. Diagnostics required. |
| **LSC: protection** | Last stop was caused by protection. In some conditions (like long powered-on periods or refilling) this can occur. This LED indicates that something exceeded normal run conditions. |
| **OK** | System OK. |
| **ERROR** | Something wrong: not all T sensors connected, one of the pressure sensors is not OK. Diagnostics required. |
| **Relays LEDs** | Indicates corresponding relay state |
## Appendix C: Diagnostic and status messages
**LastStopCause (LSC) messages. Why the compressor has stopped working.** **LastStopCause (LSC) messages. Why the compressor has stopped working.**
| Message | description | | Message | description |
| ------------- | ------------- | | ------------- | ------------- |
@ -277,7 +293,7 @@ Other:
| **HWP_ON** | Hot side pump powered on. | | **HWP_ON** | Hot side pump powered on. |
| **Err:_errorcode_** | Error code: 1 = temperature sensor error, 2 = Hot side pressure too high, 3 = cold side pressure too low. | | **Err:_errorcode_** | Error code: 1 = temperature sensor error, 2 = Hot side pressure too high, 3 = cold side pressure too low. |
## Appendix C: secret appendix ## Appendix D: secret appendix
Are you still reading? It seems you are interested in Heat Pumps, so this appendix is for you.<br> Are you still reading? It seems you are interested in Heat Pumps, so this appendix is for you.<br>
About sensors: avoid using cheap "waterproof epoxy-covered" sensors. "Waterproof" lasts for a short time.<br> About sensors: avoid using cheap "waterproof epoxy-covered" sensors. "Waterproof" lasts for a short time.<br>
Buy DS18B20s chips. No matter what sensors are buying: cheap or at a high price. I've never seen "bad" DSes. Solder sensors to the wires and cover with two layers of 2-component epoxy resin as pictured below. It will work for years. White/orange - GND, white/blue - signal, orange - +5V.<br> Buy DS18B20s chips. No matter what sensors are buying: cheap or at a high price. I've never seen "bad" DSes. Solder sensors to the wires and cover with two layers of 2-component epoxy resin as pictured below. It will work for years. White/orange - GND, white/blue - signal, orange - +5V.<br>
@ -299,7 +315,7 @@ Overall, your system with sensor locations will look like at a scheme below. Ref
<img src="./m_Valden_Heat_Pump_Controller_model.jpg" width="1000"><br><br> <img src="./m_Valden_Heat_Pump_Controller_model.jpg" width="1000"><br><br>
Your system works (or sleeps) depending on Thi temperature. For the end user it looks like setting up comfortable temperature of the warm floor via Remote Display. Your system works (or sleeps) depending on Thi temperature. For the end user it looks like setting up comfortable temperature of the warm floor via Remote Display.
## Appendix D: Firmware options and fine-tuning ## Appendix E: Firmware options and fine-tuning
QA tests, uncomment to enable QA tests, uncomment to enable
```c ```c