Verify Power to the Controller

These steps require someone to physically go to the controller panel to perform electrical tests. If the controller does not appear to be powering on, complete the following items:

1. Confirm Power is running to the Controller.

1. Check if the display panel light up and the controller beeps when you push the set up button? go to step 2
2. Does the chassis light up? 
   1. no, check the power supply/transformer first (step 3) and then the fuse (step 4)
   2. yes, use WT Controller Chassis/Terminal guide to see what the light pattern indicates. Different lights help users' diagnosis specific issues (adapter vs ribbon cable vs station keys, etc):
3. Is it connected to a working power source?
   1.  is it plugged in or is attached to a switch that has been turned off
   2. Check the circuit breaker.

2. Check if Display Screen Issue

Troubleshooting a Blank Display  

3. Fix any power Issue

1. Pull out the voltmeter to see where power is being lost. 
   1. Check the volts going into the transformer to verify power source is on.
   2. Check the transformer cord that connects the transformer to the top of the chassis. Put 1 lead on the yellow wire and 1 on the orange wire going into each adapter.
      1. It should be between 24v - 31v (electrical troubleshooting at the transformer is necessary).
      2. if there is power going into the transformer, but none going through the adapter, it is likely the transformer has failed.
      3. if there is power along the adapter, it is likely the Mini chassis has failed.

If the customer is not qualified/ comfortable testing for power, always recommend they seek help from profession electrician.

4. If its a blown or popping Fuse Troubleshooting Blown or Popping Fuses 

If the fuse has been blown, it needs to be replaced with a slow blow (or delay) fuse. Do not replace with a regular fuse.

5. Replace hardware components with loss of integrity

• Check for corrosion or similar damage on all relevant parts. It is possible that expansion and contraction from temperature changes, moisture intrusion and bugs/slugs are all cause for potential damage.

6. The "Known Good Method." 

• If the customer has other working controllers on-site or on-hand and they are willing and capable, we can guide them on swapping displays.