57
Power cycle heater, in an attempt to clear the “b4”
code. IF power cycling clears to the “b4” message
and the heater fires, drop the temperature to
suspend heating. IF “b4” reappears, go to step 18B.
Test incoming power
Power cycle heater
OFF
ON
Step 18A
18. Service LED ON: “b4” Code
“b4” Code stands for “data retrieval error”. If input data values are corrupted on power up or initial trial for
ignition, the ICB will lockout until error condition is corrected.
Step 18B
Unplug the wire harness from the P1 terminal and
test voltage on the harness (115VAC or 230VAC). IF
incoming voltage is out of range (+/-10%), repair
incoming voltage. Otherwise, replace the ICB (pg. 25).
b 4
To Previous Page
Loading...
Need help?
General
