/ Ci4000 / Ci5000 Weather-Ometer
®
Service Guide Doc. No. 07-7030-00 Rev. 0
43
5.0 TROUBLESHOOTING PROCEDURES
In 2-Sun mode, PLC3 de-energizes (closes) the
2-Sun relay K4. It also energizes relay K14 causing
the 1-Sun relay relay K15 to open. K14 also causes
closure of contacts A14-S2 and A14-S3 of the A14
rack speed control board to provide 10 RPM rack
rotation (see Fig. 5.2–9).
3) Check for continuity between terminals K14-3
and K14-4.
A) If there is continuity, relay K14 is likely
operating properly. Check for voltage
between ground and terminal K15-3 of relay
K15. It should be 0 volts. If voltage is present,
K15 is stuck closed or contacts K14-9 and
K14-11 of relay K14 are stuck closed.
Replace the malfunctioning relay (Sec. 8.1).
B) If there is no continuity, check for 24Vac
at the K14 coil terminals K14-1 and K14-2. If
voltage is present, replace K14. If no voltage
is present, and the A8 indicator light on PLC3
is off, download the software program to the
PLC. If indicator light A8 is on, replace the
PLC3 Logic Output module (see Section
5.13.5 first).
4) With relay K14 operating properly, check for
voltage between ground and terminal K4-3 of relay
K4.
A) If voltage is present, K4 is o.k.
B) If voltage is not present, check for 24Vac
at the K4 coil terminals K4-1 and K4-2. If
voltage is present, the PLC3 Logic Output
module is malfunctioning. Replace it (see
Section 5.13.5 first). If voltage is not present,
relay K4 is stuck open. Replace K4 (Sec.
8.1).
5.2 Xenon Lamp and Irradiance
Control Malfunctions (cont.)
5.2.8 Troubleshooting Procedure – 2-Sun
Irradiance Considerations (cont.)