HDG Compact 25 - Page 171

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8 Troubleshooting – Possible faults

171

F020 Please empty ash

box!

• For information only • Acknowledge with the Enter

button

F021 Temp. acc. top

short circuit

• Short circuit in the sensor or

sensor cable

• Connect sensor

• Replace cable

• Check terminal (check plug

for secure fit)

• Exchange the faulty sensor

(plug on the I/O circuit board)

with a different sensor

• If a different fault appears, the

sensor should be replaced

• If the same fault appears, the

I/O circuit board should be

replaced

F022 Temp. acc. top

open circuit

• Sensor is faulty

• Open circuit in sensor cable

• Sensor not connected

• Connect sensor

• Replace cable

• Check terminal (check plug

for secure fit)

• Exchange the faulty sensor

(plug on the I/O circuit board)

with a different sensor

• If a different fault appears, the

sensor should be replaced

• If the same fault appears, the

I/O circuit board should be

replaced

F023 Temp. acc. bot-

tom short cir-

cuit

• Short circuit in the sensor or

sensor cable

• Connect sensor

• Replace cable

• Check terminal (check plug

for secure fit)

• Exchange the faulty sensor

(plug on the I/O circuit board)

with a different sensor

• If a different fault appears, the

sensor should be replaced

• If the same fault appears, the

I/O circuit board should be

replaced

No. Fault Cause Remedy

Table 8/1 - Faults

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