Bryant 619R C Series Service Manual page 18

Communication malfunction between indoor and outdoor units diagnosis and solution (E1)
Error Code
Malfunction decision conditions
Supposed causes
Replace the reactor.
E1
Indoor unit does not receive the feedback from outdoor unit during 110 seconds and this
condition happens four times continuously.
S
Wiring mistake
S
Indoor or outdoor PCB faulty
Power off, then restart the unit 2 minutes later.
(Vs is the voltate between S and L2 of the
outdoor unit. Red Probe on S
& Black Probe on N
Check the outdoor wiring connection.
Check whether
the reactor is normal.
Replace the outdoor main
PCB. Power ON. Is the error
corrected?
Replace the indoor main PCB.
Fig. 23 – Troubleshooting
Check the indoor wiring connection.
Replace the indoor main PCB. Power
on. Is the error corrected?
Replace the outdoor main PCB.
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