The Indoor Unit Does Not Turn On

Issue: The Indoor Air Handler Does Not Turn On.

Solution: Try the manual emergency button on the indoor unit, to rule out the remote.
Solution: Verify that the wire order is equal between indoor and outdoor units. Color order must match. Check for splices or damage on the control cable. To rule out variables, remove any accessorial items such as UV lights or condensate pumps until the problem is resolved.
Solution For 230V systems: Use a multi-meter to check AC voltage across terminals L1-L2 on the outdoor system (touch one probe to L1, the other probe goes on L2, do not meaure each leg to ground). Verify whether the reading is between 208~253 VAC.
- If the reading is between 208 and 253 VAC, measure whether the reading is the same across 2-3 on both the outdoor unit, and the indoor unit. All readings must match.
- If the reading is 0 VAC, then the system is not receiving proper power from the power souce. Some common reasons are:
  - A fused disconnect is being used, but fuses are blown or not inserted properly.
  - The disconnect box bus-bar is in the OFF position.
  - A double-pole breaker is not being used. Single or tandem breakers will not work.

For 230V systems, the system must receive a full 230V reading in order to function. Adding up 115V legs to ground does not work.