Part No. 20862 Rev. G February 2015
- 28 -
Chilled Cabinets
Refrigeration
cont.
CABINETS - SERVICING
ACR Fault
Finding Guide
First check if the condensate water level probe in the ACR tank is dirty and
needs cleaning (a dirty probe may either fail to detect water, or give a false
indication of water) clean if required.
If the sensitivity is set too low, the Finder Level Control unit may not detect the
condensate water and won’t switch on the ACR element. If the sensitivity is set
too high, the Finder Level Control unit may get a false indication of the
condensate water and switch on the ACR element without water present.
Fault:
ACR element is on continuously when no condensate water is present.
Test:
Check if the Finder Level Control unit is faulty by disconnecting the probe
wire from terminal B1 on the Finder Level Control unit. With the cabinet power
turned on and after waiting 10 seconds, check for 230V across terminals 11 and
14. If 230v is not present across terminals 11 & 14, replace the Finder Level
Control unit.
Fault:
ACR element does not heat even though condensate water is present
and touching the water level probe.
Test:
Check if the Finder Level Control unit has a 230V power supply.
Next, check the manual re-set Thermal Cut-out, located on the lower right hand
side of the ACR heater tank, at the rear of the cabinet. If the Thermal Cut-out
won’t re-set and remains open circuit, replace the Thermal Cut-out.
Next, check the Finder Level Control unit water sensing circuit, by short-
circuiting the level sensor terminals B1 & B3. Turn the cabinet power on and
wait 10 seconds, check if the ACR element heats. If the element heats, check
for an open circuit in the water sensing probe circuit and clean the probe.
If the element does not heat, turn the cabinet power off and take the element
wire out of terminal 11 and wire into terminal 14 on the Finder Level Control
unit. Turn the cabinet power on and wait 10 seconds, check if the ACR element
heats. If the element heats, replace the Finder Level Control Unit. If the element
does not heat replace the element.
Condensate
Element
Replacement
To replace the element,
remove the safety cover,
and squeeze the sides of
the element together to
disengage it from the
mounting bracket.
Cut the feed cables at the
heat-shrink covered connection and remove the old element. Insert and
connect a new element, fitting new heat-shrink sleeves over the connections.
Replace the safety cover, making sure that it is properly located.
Continued on next page
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Страница 38: ...Part No 20862 Rev G February 2015 38 Visair Chilled Cabinets MECHANICAL DRAWINGS Inline Visair IN M11C B003...
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