/ Ci4000 / Ci5000 Weather-Ometer
®
Service Guide Doc. No. 07-7030-00 Rev. 0
41
5.0 TROUBLESHOOTING PROCEDURES
A) If the LED is off, check for continuity across
terminals K9-9 and K9-10 of relay K9. If there
is continuity, then resistor R4 (Ci4 only) is
open-circuited or the wattage regulator has
failed. Replace the regulator per Section 8.7.
B) Check for 24Vac volts across the K9 relay
coil terminals K9-1 and K9-2.
B1) If voltage is present, and there is no
continuity between terminals K9-9 and
K9-10, replace relay K9 per Section 8.1.
B2) If voltage is not present, and the B5
LED on PLC3 is on, replace the PLC3
module (see Section 5.13.5). If B5 is off,
download the software program to the
PLC. If this fails to restore operation,
replace PLC3.
8) Observe the ammeter on the AR1-1 terminal. It
should display a reading of approximately 4mA.
A) If the ammeter reading is zero, or well
above 4mA, there is potentially a problem
5.2 Xenon Lamp and Irradiance
Control Malfunctions (cont.)
5.2.7 Troubleshooting Procedure – Irradiance
Low or High (Wattage Regulator) (cont.)
Figure 5.2 – 11 Wattage Regulator Output LED
Soft
Start
LED
Output
LED
with the PLC Analog Output PLC6 module.
(This will be checked in a later step.)
9) Stop the wattage test and alter it to the mid-
range operating wattage level shown below.
– 3000 watts
Ci4000 – 5000 watts
Ci5000 – 8000 watts
10) Initiate the new test to ignite the lamp.
11) Observe the green LED indicator light on the
lower circuit board of the wattage regulator. This
is the output indicator and becomes brighter as
output increases. It should be on brightly.
A) If the LED is very dim or off, and the
ammeter reading is well above 4mA, there
is a problem with the wattage regulator
output. Replace the regulator (Section 8.7).
B) If the ammeter reading is zero, still at 4mA
or is unstable, there is a problem with the
PLC Analog Output PLC6 module or the PLC
CPU (PID settings, corrupt PLC software or
CPU failure).
B1) Replace the PLC6 module (see Sec.
5.13.8 first). Run the mid-range wattage
test again. Check the level and stability
of the ammeter reading. It should be very
stable and approximately 5 to 10 mA.
B2) If replacement of the PLC6 module
does not correct the problem, download
the custom programs from the PLC to a
laptop computer and replace the CPU
module of the PLC (see Sections 5.13 and
Appendix A). Upload the custom pro-
grams and the correct PLC operating
software. Run the mid-range wattage test
again and observe the ammeter reading
for stability. If this corrects the problem,
reinstall the old PLC6 module and confirm
operation.