Today at Atelier Kaz - ex-Honda R&D, F1, Indy/CART engineer
A/C CCU Board service 02
by , 07-11-2021 at 01:21 PM (1245 Views)
The usual process…..
But unlike other CCU boards, had to remove both green connectors......
Ready for the bench testing and this was when I found the issue with the fan speed control.
Everything works except for the fan speed.
It only drives the power Tr when at max speed setting.
No chopping of Tr base current and simply not switching the power Tr at all.
Dead light bulb so replaced it.
Tags:
a/c ccu board,
ccu,
climate control unit
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