Drive Unit Temperature Warning, 39467

in IRC5
Hello to members.
yesterday i was working on abb, and it suddenly give warning "drive unit temperature warning, 39467".The temperature has risen above above the warning level in drive number "1". The probable causes mentioned for that i have cross checked 2,3 times. fans are ok, ambient temperature was ok. no hard acceleration issue.
study the material i found a manual for S4C Plus controller mentioning PTC thermal supervision. Unfortunately i don't have "circuit diagram" pdf manual for IRC5. if some one please share i ll have a look for PTC settings, and connection from motor to IRC5 panel board. should i have to check the PTC hardware at the "axis 1" motor side also.
any other hint for the mentioned alarm, if someone can share.
regards
yesterday i was working on abb, and it suddenly give warning "drive unit temperature warning, 39467".The temperature has risen above above the warning level in drive number "1". The probable causes mentioned for that i have cross checked 2,3 times. fans are ok, ambient temperature was ok. no hard acceleration issue.
study the material i found a manual for S4C Plus controller mentioning PTC thermal supervision. Unfortunately i don't have "circuit diagram" pdf manual for IRC5. if some one please share i ll have a look for PTC settings, and connection from motor to IRC5 panel board. should i have to check the PTC hardware at the "axis 1" motor side also.
any other hint for the mentioned alarm, if someone can share.
regards
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any help pleaseee..