Bryant 619AHB Series Service Manual page 30

SG-619AHB-01: Service Manual
DIAGNOSIS AND SOLUTION (CONT)
Over voltage or too low voltage protection diagnosis and solution (P1)
Malfunction Decision Conditions
An abnormal voltage rise or drop is detected by checking the specified voltage detection circuit.
Possible Causes:
• Power supply problems
• System leak or blockage
• PCB faulty
Troubleshooting
Check the power supply.
Check the connections
Check the voltage between P and N.
NOTE: Measure the DC voltage between the P and N port. The normal value should be around 310V.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Yes
and wires.
Yes
Yes
Check the reactor.
Yes
Replace the reactor.
No
Correct the connections or
No
No
Replace the IPM board.
No Replace outdoor main PCB.
Fig. 33 — Test
30
Stop the unit.
replace the wires.