Troubleshooting; Error Codes; Thermostat Is Not Controlling The Ptac Unit - Friedrich EMWRT-1 Instruction Manual

Troubleshooting

Error Codes

ERR 1 Thermostat Temperature Sensor Hardware Defect
ERR 2 Thermostat Radio Hardware Defect
ERR 3 Thermostat Radio Software Defect
ERR 4 No link with the Wireless Control Card
ERR 5 Thermostat Memory Defect

Thermostat is not controlling the PTAC unit.

Verify the status of the red light on the Wireless Control Card;
The red light is off
➤
The Wireless Control Card is not powered. Verify that the Wireless Control Card is properly
wired to the PTAC unit - specifically make sure that the RED and the BLACK wire are
properly connected;
If the red light is blinking with one (1) flash
➤
The Wireless Control Card is powered but it is not communicating with the thermostat, turn
the thermostat off and on to re-initiate the linking procedure.
The red light is blinking with three (3) flashes.
➤
The Wireless Control Card is communicating with the thermostat. Verify that the Wireless
Control Card is properly wired to the PTAC unit and that equipment settings on a
thermostat - compressor type, electric heat and reversing valve - are properly configured.
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