Service Call 501-584
D146/D147/D148/D149/D150 5-70 SM
SC No. Level Error Name/Error Condition/Major Cause/Solution
SC547-01 D Zero cross error (relay-contact soldering)
In the event of an error
§ Fusing relay defective (contact soldering)
§ Fusing relay drive circuit fault
§ Turn the main power supply switch OFF/ON
§ If the fusing relay is damaged, replace the PSU
§ Check the connection between PSU and control board, and
replace harness and board if necessary
SC547-02 D Zero cross error (relay contact fault)
In the event of an error
§ Fusing relay damage (contact open)
§ Fusing relay drive circuit fault
§ PSU fuse (24VS) blowout
§ Turn the main power supply switch OFF/ON
§ If the fusing relay is damaged, replace the PSU
§ Check the connection between PSU and control board, and
replace harness and board if necessary
§ If the PSU fuse (24VS) blows out, replace the fuse
SC547-03 D Zero cross error (low-frequency error)
In the event of an error
Frequency instability of commercial power line
§ Turn the main power supply switch OFF/ON
§ Check the power source
§ Check the connection between PSU and control board, and
replace harness and board if necessary
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