- Apex Generator User Manual
5708009-C 6-9
Apex 1 to 5.5 kW Generator
E020
User interlock 
open
When the AC On LED is lit and the Interlock LED 
is not lit, this means either the interlock is not 
satisfied or was interrupted. Both the interlock LED 
and the RF output will remain off until the interlock 
is satisfied and an RF off command is given.
Make sure that the 
RF output cover is 
firmly attached and 
ensure the interlock 
pins on the User port 
are satisfied. Refer to 
“Apex User Port 
Options” on 
page 4-2.
or
See “Interlock LED 
is not Lit” on 
page 6-5.
E025
Target life 
expired
When the user set target life ends, this error code is 
reported. The output will not be turned off when the 
error is reported. However, once the output is turned 
off while this error is active, it cannot be turned on 
until a new target life is set
Set new target life 
then send RF On 
command to reset 
unit. 
E029 Ripple 
Current Error 
(missing phase)
The input line voltage is rectified internally to a bus 
voltage. The Apex generator monitors the bus 
voltage for excessive ripple. If excessive ripple is 
detected, this error is displayed. A missing phase on 
the input line voltage or an unstable plasma may 
cause this error.
Verify that all three 
phases are present on 
the input voltage 
lines and that the 
plasma is stable. If 
the problem persists 
call AE Global 
Support.
E033 
Temperature 
Rate Threshold 
error
The Apex unit monitors the rate at which the cold 
plate temperature is changing. If the temperature 
increases too fast, the Apex generator protects itself 
by shutting the output off. 
To clear the error, 
send RF OFF 
command to reset the 
unit; if error code 
does not clear or if 
the output does not 
come on, the cooling 
plate temperature 
exceeded the over 
temperature 
shutdown threshold. 
See “Overtemp LED 
on Solid” on 
page 6-4. 
Table 6-1. Error Code Table (Continued)
Error Code Error Code Description Solution










