Hardware test
When the system turns on, it runs through a hardware test. If any problem is detected, it will show on the display screen.
Fault codes
You may see one of the following fault codes on the H-series screen:
PP - Pump fault
This fault is reported when no pump is found, or the pump is not spinning (see "pump will not run" below.
NL - Nursery light
Check the connections. This fault is reported when no power is used when the nursery light is supposed to be on.
NH - Nursery heater
Check the connections. This fault is reported when no power is used when the nursery light is supposed to be on.
EC - EC/Nutrient sensor
Turn the whole system off and on again. If the fault is still there, the sensor has failed.
WiFi fault codes
If the system has a problem connecting to WiFi for ten times in succession, it will go into a WiFi fault state, and will not attempt to connect again for another half hour. A WiFi fault does not stop the system from operating normally. You can still connect to the Device Control Panel via the device wifi (Method 1).
WiFi codes shown on screen:
W1
WiFi authentication fail - usually an incorrect password.
W2
Access point not found - the network saved in the system cannot be found. Sometime this happens if the H-series is just at the limit of the WiFi range.
W3
Timeout when connecting to WiFi. Perhaps the network was busy, or sometimes a low signal strength can cause this.
Pump will not run / pump fault
If the water pump will not run, first remove the lower watering tray above the control unit and check that the output on the circuit board is coming on (there's a little green light). If the light comes on, there is a problem with the pump.
Remove the filter, and remove the front of the pump. Check for debris which might be stopping the impeller from turning.
Check the pump by plugging it into either the nursery light or nursery heater output (on the rear of the control unit). If it still doesn't run, the pump is likely to be faulty.
Grow lights will not turn on or turn off
The main lights are controlled by an independent control board (mounted on the rear upper panel), which manages the dimming, sensor and fans for each grow level. When the control board is operating, a blue light will flash, once per second. If this light is off, or is on without flashing, turn off the system, wait a few seconds, then turn back on again.
The main screen should show "H1 found" during the startup sequence (or H2 or H3).
If a light control board is detected, the main control unit will remember it's supposed to be there, and will continually check for faults. If a fault is found, the control unit will power cycle the light control cable in an attempt to fix the problem. In this case, the screen will show "hBus fault, restarting". See below.
If you cannot get the light control board to flash, or you can't get the main control unit to detect the light control board, check the the "Light control board" help article.
hBus fault, restarting
hBus is the communication method that the main control board uses to talk to the light control boards. The main control board will continually check to see if the configured light control boards are found and functional.
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To see what levels are configured, log on to the device control panel. You'll see blocks across the bottom of the screen (see screenshot). If you have no sensor plugged in, humidity and temperature will show 0. Firmware shows the light control board version. Status: 1 is OK, above 1 is not found or fault. When status goes over 10, it's been reported as not found 10 times and the hBus power is turned off and on again. If you don't have a level 2, but the system is configured with a level 2:
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Pump is running but no water is coming through the system
Check the feed pipe is connected to the right port on the pump, and that there is no blockage.
Nursery temperature not going up
Check sensor is suitably positioned. Is the heater pad warm? If the ambient temperature is very low, the heater may not have enough strength to increase the temperature noticeably. If the heater pad is not warm at all, there may be a heater fault. The screen should show “NH” [Nursery Heater] on the system status page. Check connections, or replace heater.
Tank EC reads “invalid”
... or nutrient level is reporting 0 degrees C / 0 EC.
This means that the EC sensor has not reported a good reading for a while.
When the device first turns on, the EC sensor will update once every second for the first 5 minutes. After that, it will update once every 5 minutes. If you don't get a valid reading in more than 10 minutes, or the sensor has failed, you will see the error code "EC" on screen.