

Rational Service 40: the iCareSystem is short of care liquid
On an iCombi Pro with the automatic dosing version of the iCareSystem, care liquid protects the steam generator from scale.
Mon–Sat, 8am–8pm
- Water, fill and drain
- Dish machine repair
- Source: Rational
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What Service 40
actually means.
On an iCombi Pro with the automatic dosing version of the iCareSystem, care liquid protects the steam generator from scale. Service 40 reports that the amount it drew was too low. Rational lists cooking as possible.
Rational commercial appliance display · also shown as 40
What to do when Service 40 shows on the commercial applianceKind of codeWater, fill and drain
Water is not arriving, not reaching its level, not heating or not leaving on time. A dish machine may be short of fill because a supply valve is half closed or its line strainer is clogged, it may drain slowly through a scrap basket full of debris, or its booster may be too scaled to heat the rinse; a combi's steam generator may be scaled or its water treatment exhausted; a washer-extractor may time out on a slow drain. Opening the supply valve, cleaning strainers with the unit off and checking the drain line are fair; a pump, a fill valve, a heater or a leak near wiring is a visit.
Usually leads toDish machine repair
Undercounter, door-type and conveyor dish machines: tank heaters, boosters, wash pumps, fill and drain valves.
Shows up asCommercial Appliance Error Code on a Combi, Fryer, Dish Machine or Laundry Display
A commercial appliance error code appears as letters or numbers on a combi, fryer, reach-in controller, dish machine or laundry machine display, or as a flashing light or an alarm tone.
MakeRational
A Rational visit is timed after the evening cleaning cycle, when the cabinet is cool and the display can be read without a load inside.
SourceRATIONAL iCombi Pro floor units 20-1/1 and 20-2/1, original instructions for use (US English)
Listed in the error message tables of the iCombi Pro floor unit instructions for use (models 20-1/1 and 20-2/1, US English edition).
Before you book,
in this order.
Each step comes from Rational's own guidance for Service 40 on its commercial appliances. Follow it to the end: the last card says whether this is a visit.
Look at the care product container or cartridge and swap it when it is empty or close to it.
Make sure the suction line sits properly in the container and is not kinked.
If the container is full and Service 40 keeps appearing, book a visit to have the dosing checked.
What not to do
Service 40 is not a water supply problem; low water during cleaning is Service 25. It also does not mean the steam generator is already scaled, though running without care liquid for long makes that more likely.
What you may
notice with it.
The commercial appliance problems Service 40 tends to arrive with. Answer these at the commercial appliance before anyone is booked.
All problemsWhere Service 40 usually leads
Dish machine repair.
Rational
commercial appliances.
A Rational visit is timed after the evening cleaning cycle, when the cabinet is cool and the display can be read without a load inside.
Rational commercial appliance repairMore Rational codes
Water, fill and drain on other makes
In Rational's own words
The quantity of care liquid required by the iCareSystem is too low.
Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Listed in the error message tables of the iCombi Pro floor unit instructions for use (models 20-1/1 and 20-2/1, US English edition).
Rational Service 40 commercial appliance repair,
where we come out.
The same visit in every metro below: the code, the model number, and a diagnosis before any part is ordered.
All service areasTampa BayFL · 31 areas
Miami / South FloridaFL · 47 areas
New York MetroNY · 75 areas
HoustonTX · 36 areas
ChicagoIL · 50 areas
Los AngelesCA · 95 areas
San DiegoCA · 31 areas
Questions
about Service 40.
Can I clear Service 40 myself?
Can I cook on a Rational with Service 40?
Why does Service 40 appear with a full care container on my Rational?
What happens if I ignore Service 40 on a Rational?
Back to your everyday
Still showing Service 40?
A booking with a code goes further when it has the code as shown, the model and serial from the data plate, and a word on whether the unit still holds temperature, heats, rinses or spins. With those three, the office can match the likely part to your unit the same day.