RKI Instruments RI-215A - Manual (Page 20)

20 • Overview RI-215A Operator’s Manual
Chapter 5: Maintenance
Overview
This chapter describes maintenance and troubleshooting procedures for the RI-215A. It
includes instructions for the replacement of the RI-215A’s gas sensor and fuse and
calibration procedures. A spare parts list is located at the end of this chapter.
Preventive Maintenance
This section describes a preventive maintenance schedule.
Daily
Verify a display reading for CO
2
in ppm. Investigate significant changes in the reading.
Typical background levels of CO
2
are 200 to 400 ppm, depending on location.
Quarterly
Calibrate the unit. See See “Calibration” on page 22.
Troubleshooting
The troubleshooting table describes error messages, symptoms, probable causes, and
recommended action for problems you may encounter with the RI-215A.
Table 3: Troubleshooting the RI-215A
Symptoms Probable Causes Recommended Action
• The LCD does not show
a gas reading or is blank. • Power may have been
terminated to the unit.
• The unit may have
been incorrectly
connected to a power
source.
• The wrong power
source is being used to
run the unit.
• The fuse may have
blown.
• The unit may be in
Maintenance Mode.
1. Verify that the power source has been
turned on and is working.
2. If a circuit breaker has been used in the
installation of the RI-215A, make sure
that the circuit breaker has not been
activated.
3. Verify that the wiring to the power source
has been connected correctly.
4. Make sure you have used the correct
power source: 24 VAC or 24 VDC.
5. Open the unit and check the fuse.
Replace the fuse if required. The RI-215A
takes the following replacement fuse: 0.
5A, 125 VAC (5.2 mm x 20 mm).
6. The unit may be in Maintenance Mode.
Press the MODE switch for three
seconds, or until a gas reading appears.
7. If difficulties continue, contact RKI.