23
Fig. 47 — USB Log Export Menu
Black box data can be triggered manually which is useful for trou-
bleshooting. Login level is Service or higher and the black box
data can be generated from the "Trigger BlackBox" icon near the
bottom right corner of the 23XRV Diagnostics Menu (Fig. 48).
Fig. 48 — 23XRV Diagnostics Menu
PRESSURE TRANSDUCER CALIBRATION
The HMI pressure readings are displayed in the Main Menu
Inputs Menu
Pressure screen. See Fig. 49.
Fig. 49 — Pressure Screen
Once a year the pressure transducers should be checked against a
pressure gauge. Attach a set of accurate refrigeration gauges to
the transducer being checked and compare the two readings. If
there is a difference the transducer can be calibrated as described
below. Calibration requires Service level or higher access to the
HMI.
NOTE: It is usually not necessary to calibrate at initial start-up un-
less chiller is at high altitude.
1. Go to Main Menu
Quick Test Menu
Transducer
Calibration. See Fig. 50.
Fig. 50 — Transducer Calibration Menu
2. Each transducer is supplied with 5 vdc from the 1IOB and
SIOB. Calibration is done by adjusting the appropriate
Pressure Sensor on the Transducer Calibration screen. If
required calibration is more than 5 psig (34.5 KPa) the
transducer needs to be replaced.
TEMPERATURE SENSOR CALIBRATION
The thermistors can be calibrated to have their temperature read-
ings offset by a specified amount (up to 5°F (2.8°C)). Follow
these steps for each sensor:
1. Go to Main Menu
Quick Test Menu
Thermistor
Calibration. See Fig. 51-53.
Temperature readings are conveniently available at Main
Menu
Inputs Menu
Temperature.
Fig. 51 — Thermistor Calibration Menu
Fig. 52 — Temperature Input Menu, Page 1
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