Bosch HBL 73 Service Manual page 44

Tuesday, June 18, 2002
BOSCH 700 SERIES:
ELETTRODOMESTICI
SERVICE INSTRUCTIONS FOR OVEN TESTING AND BASIC TROUBLESHOOTING
VIA CHECCHI 98
I 21013 GALLARATE
ITALY
MICRO
F151 EEPROM FAILURE OR
COMMUNICATION CIRCUIT
ERROR
F153 CONTROL CALIBRATION VALUES
OUT OF RANGE
F155 CORRUPTED EEPROM
1. Check power and Display Board connectors P1B and associated wiring.
2. If OK, replace Display Board.
3. If fault persists, replace Power Board.
1. Check power and Display Board connectors P1B and associated wiring.
2. If OK, replace Power Board.
3. If fault persists, replace Display Board.
1. If the fault message is displayed
down, the control saves the current time but fails to calculate and write the
checksum in its memory. At the following power-up, a fault occurs due to this
failure.
2. If F155 appears when starting a cooking
parameters in the control memory are corrupted.
Board.
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at power-up, ignore it. Sometimes at power
mode, it means that the cooking
Replace immediately the Display