Kegs Not Draining/Tank Level Changes
After a cycle, if the kegs have liquid remaining in them or tank levels have changed, check for
proper operation of the drain sensor/X3 light on control panel. During the evacuation stages,
the keg washer will continue to purge until it detects all liquid from the kegs has been depleted,
X3 light goes out, or the time limit has been reached, “sensor fault”. If the X3 light fails to come
on when liquid is present, or works intermittently, the keg washer may move on to the next
step before the kegs are fully evacuated. This can result in liquid remaining in the kegs after
cycle completion and/or increasing or decreasing tank levels. Check sensor wiring for loose
connections. If the wiring is good, but the X3 light never comes on, the sensor may be bad. If
this is the case, lengthening the “PRE-BLOW” time (See Figure 16) can get the machine running
again until you get a new sensor. Set the “PRE-BLOW” time just long enough to evacuate the
kegs on the longest wash setting, usually 20-25 sec. on factory settings. This may be longer on
custom wash settings and could take a few attempts to get the time right.
If liquid is remaining in a keg after cycle completion, the coupler washers, or the couplers
themselves, may need to be replaced. As these parts wear, the couplers may not engage the
keg stem properly, resulting in incomplete draining. With this issue, the function of the drain
sensor (X3) will be normal. This may occur in one or all kegs, but changing the washers usually
will solve the problem.
Sanitize System
The chemical sanitizer is injected into the keg washer’s water line by means of a peristaltic
pump and injector/check valve. The peristaltic pump uses a rubber “pinch” tube to draw in the
sanitizer from a customer supplied container and pump it into the waterline through an
injector/check valve. The pinch tube, roller assembly, and injector/check valve are considered
wearable parts and are not typically covered under warranty. Problems with the sanitization of
kegs are usually the result of a worn or damaged pinch tube, worn or plugged injector/check
valve, worn roller assembly, or any combination of these. These parts will require periodic
replacement, and with heavy usage of the keg washer and/or the use of harsh chemicals such
as peracetic acid, more frequent replacement of these parts will be likely. Premier Stainless
recommends replacing both the pinch tube and injector/check valve together when sanitizer
flow issues occur. The roller assembly may need replacing once or twice a year depending on
usage. Premier Stainless also recommends the periodic testing of post sanitize drain water from
the kegs. This can detect changes in the chemical concentration due to the breakdown or
failure of the pinch tube, injector/check valve and/or roller assembly before a complete failure
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