6. No Display
PHM2126S
No Display
Is there power
between H8-1 and H8-2
on AP1 Output
Board?
No
No
Replace blown fuse(s).
NOTE: Make sure machine is
powered and that E-stop is out.
1. Is there 24VAC from H3-1 to H3-2 on
AP1 Output Board and the 5VDC LED
lit?
2. Is there:
+24VDC from H3-18 to H3-4
+28VDC from H3-18 to H3-3
+5VDC from H3-18 to H3-5
Yes
Verify H1/H3 harness is intact.
No
Is harness in
good
condition?
Yes
Replace/repair
harness as
necessary.
No
No
Replace AP2 Control Logic Board.
Yes
B
Check
for 208-240VAC at
H9-3 and H9-2 on AP1 Output
Board. Is voltage below
225VAC?
Install 208V
transformer
jumper.
Yes
A
Disconnect
H6 door harness from
AP1Output Board, then reset
B-E. Is there display?
Repair/replace
door harness
or door switch.
Yes
H
F
E
C
D
G
Is control in Low
Power Mode?
Yes
No
Press keypad for OPL
models to wake up the
control or cycle power to the
machine.
Yes
If checks are still not correct
replace AP1 Output Board.
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