Maintenance - MasterCool 55800 Bedienungsanleitung

Display Properties:
• Display relative magnitude of the detected leaks
• Visual indication of the selected sensitivity range (high, medium or low).
• Displays the readiness status of the unit (wait, ready or interference).
• Displays the selected mode of the unit (peak, hold or mute).
• Annunciates and displays fault conditions of the unit.
• Displays accumulated sensor hours on request.
• Low battery Indicator
Probe:
• Intelligent tip, with environment sensing element to eliminate the potential of false alarms.
• Flexible 15.5 inch (39.3 cm) probe length for difficult to reach locations.
Keypad Controls:
• ON/OFF button (push-on/push-off)
• Volume/Mute button (high, low or mute)
• Sensitivity button for High, Medium and Low sensitivity level selection
• Hold button to hold the signal bars (push enable/disable)
• Peak button when multiple leaks are suspected (push enable/disable)
Powering the Unit ON:
Momentarily depress the center ON/OFF button on the keypad. Upon receiving the ON command,
the following information appears on the LCD screen:
• All the vertical bars become lighted.
• The red WAIT legend begins to blink.
• Either an A or an F appears on the screen, depending on the refrigerant detected.
PLEASE NOTE:
• When working with most CFCs, HFCs, and HCFCs you will want to be in the A mode
• When working with hard to detect gases such as R1234yf, R407C or simply to heighten
sensitivity levels beyond normal settings use the F mode. Please note that F mode will be
too sensitive in most applications so only use this mode in extreme cases.
• As the sensor heats up, the vertical bars begin to extinguish one at a time until all bars are
extinguished.
• When this occurs, the red WAIT legend disappears and a green READY legend appears.
• The unit begins "beep" unless it is muted, in which case, the legend MUTE will appear on the
LCD.
• The unit will start in the low sensitivity range everytime at power up.
Selecting a Different Sensitivity Setting
Press the SENSITIVITY button on the keypad to change the sensitivity setting of the unit.
Selecting a Different Refrigerant
To change the refrigerant from A to F mode or vice versa, press and hold the PEAK keypad button
until the refrigerant shown on the LCD changes. Within a few seconds, the unit will shut itself
off to store the new refrigerant. When this occurs, depress the ON keypad button to turn the unit
back on. The unit will begin its normal power-up sequence. The selected refrigerant will remain
in memory when the unit is turned off.
Selecting the Hold Feature
To enable the HOLD feature, momentarily depress the HOLD keypad button. The LCD will display
an H legend to indicate that the hold feature is enabled.
The HOLD feature was implemented for the purpose of allowing the user to search for leaks in
hard to reach locations. This feature retains the relative magnitude of a detected leak on the LCD
for an indefinite period of time or until another leak is detected, in which case, the previous leak
display is erased and the new leak is displayed on the LCD. When the HOLD button is depressed
again, the unit will exit the hold mode and resume normal operation.
Selecting the Peak Feature
To enable the Peak feature, momentarily depress the PEAK keypad button. The LCD will display
the word PEAK and all the vertical bars will be outlined in white
The PEAK feature was implemented for the purpose of identifying the largest leak in a system
with multiple leaks. When the first leak is detected, the last vertical bar will remain lighted after
the alarm takes place. The next time a leak is detected, if the detected leak was smaller than
the first detected leak, the original last vertical bar will remain. If another leak is detected, but
this leak exceeded the first leak, the last vertical bar of the larger leak will become lighted. If a
detected leak lights up all the bars, this is an indication that the sensitivity of the unit should be
decreased. To exit the PEAK mode, momentarily depress the PEAK keypad button.
To Change the Volume
The VOLUME keypad button controls the normal and low volumes of "beep" tones and mutes the
tones. Each time the VOLUME keypad is depressed, the LCD communicates to the user the state
of the volume control. If the normal volume is selected, the LCD will momentarily display 10 ver-
tical bars. If the low volume has been selected, the LCD will momentarily display 5 vertical bars.
When MUTE is selected, the LCD will display the MUTE legend. When the unit is in MUTE, only the
"beep" tones are muted, the alarms will continue to annunciate at the normal level whenever a
leak is detected.

MAINTENANCE

To Install or Replace the Alkaline Batteries
Remove the battery cover as shown in Figure 1 and remove the existing batteries. It may be
beneficial to turn the unit vertically and shake out both batteries. Install two D size alkaline
batteries with the polarities shown in Figure 1. Re-install the battery cover and secure with the
cover screw.
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