Watlow ez-zone pm - Page 234

Watlow EZ-ZONE
®
PMI Controller • 230 • Chapter 11 Appendix
Indication Description Possible Cause(s) Corrective Action
Device Error
100
rEtn
Controller displays
internal malfunc-
tion message at
power up.
• Controller defective
• Sensor input over driven
• Replace or repair control-
ler
• Check sensors for ground
loops, reverse wiring or
out of range values.
Heater Error
h.Er
Heater Error • Current through load is
above current trip set
point
• Current through load is
below current trip set
point
• Check that the load cur-
rent is proper. Correct
cause of over current
and/or ensure current
trip set point is correct.
• Check that the load cur-
rent is proper. Correct
cause of undercurrent
and/or ensure current
trip set point is correct.
Current Error
C.Er
Load current incor-
rect.
• Shorted solid-state or
mechanical relay
• Open solid-state or me-
chanical relay
• Current transformer load
wire associated to wrong
output
• Defective current trans-
former or controller
• Noisy electrical lines
• Replace relay
• Replace relay
• Route load wire through
current transformer from
correct output, and go to
the
C.si
Source Output
Instance parameter (Set-
up Page, Current Menu)
to select the output that
is driving the load.
• Replace or repair sensor
or controller
• Route wires appropriate-
ly, check for loose con-
nections, add line filters
Menus inac-
cessible
Unable to access
sEt, opEr, fCty
or prof menus or
particular prompts
in Home Page
• Security set to incorrect
level
• Digital input set to lock-
out keypad
• Custom parameters in-
correct
• Check
LoC
settings in
Factory Page and enter
appropriate password in
ULoC
setting in Factory
Page
• Change state of digital
input
• Change custom param-
eters in Factory Page