--- title: "CellarCool E7: no signal between the keypad and the board" description: "What E7 means on CellarCool E7: no signal between the keypad and the boards, what to check before booking, and when it is not a failure at all." url: "https://winecellarrepair.center/error-codes/cellarcool-e7/" --- # CellarCool E7: no signal between the keypad and the board CellarCool's split and ducted systems put the keypad on a display cable, often some distance from the unit. ## What E7 actually means. CellarCool's split and ducted systems put the keypad on a display cable, often some distance from the unit. E7 appears when the keypad and circuit board have had no communication for 60 seconds. It usually follows damage to that cable or a plug pulled partly out, and less often a failing keypad or board. CellarCool wine cellar cooling unit display What to do when E7 shows on the wine cellar cooling unit ### Kind of code Power and controller The unit saw its supply dip, surge or drop out, or the controller has lost contact with the board it drives. The cause is as often a shared circuit, a tripped GFCI outlet, a loose connection or a storm outage as the unit itself. A breaker that will not stay on or a scorched smell means switching the circuit off at the panel, standing dry and away from the unit, and keeping the cellar door closed until the technician arrives. ### Usually leads to Wine cellar cooling diagnostic visit A visit that reads the cellar, the room the heat goes to and the cooling unit itself, and ends with one named cause, whether it is a part or the room. ### Shows up as Cellar Cooling Controller Display Blank A cellar cooling controller display blank shows nothing at all, flickers, shows half a number, or ignores its buttons, sometimes while the unit keeps cooling and sometimes while it stops. ### Make CellarCool Service for CellarCool systems when the wine room drifts warm, turns dry or the unit starts and stops every few minutes. ### Source CellarCool CM2500 (Ceiling Mount split) manual, version 4 (02/2022) CellarCool split, Ceiling Mount and fully ducted Ultimate controllers (CM2500, 3500-S/5000-S, Ultimate-R manuals). The CX through-the-wall series does not list this code. ## Before you book, in this order. Each step comes from CellarCool's own guidance for E7 on its wine cellar cooling units. Follow it to the end: the last card says whether this is a visit. 01 Check the display cable where it plugs into the keypad. 02 Follow the cable as far as you can for kinks, staples or a frayed jacket. 03 If the cable looks sound and E7 stays, book a visit. ### Still there? It usually turns into [wine cellar cooling diagnostic visit](https://winecellarrepair.center/services/diagnostic-visit/). Book with the code and the model number. ### What not to do E7 says nothing about cooling performance; the unit can still be running. It only means you cannot trust or change what the keypad shows. ## What you may notice with it. The wine cellar cooling unit problems E7 tends to arrive with. Answer these at the wine cellar cooling unit before anyone is booked. [All problems](https://winecellarrepair.center/problems/) Before you call ### [Cellar Cooling Controller Display Blank](https://winecellarrepair.center/problems/cellar-controller-display-blank/) [All 4 causes, cheapest first](https://winecellarrepair.center/problems/cellar-controller-display-blank/) It also comes with - [**Cellar Cooling Unit Error Code**](https://winecellarrepair.center/problems/cellar-cooling-unit-error-code/) Problem ### Cellar Cooling Controller Display Blank 4 causes, cheapest first Where E7 usually leads ## Wine cellar cooling diagnostic visit. Book a visit [What the job involves](https://winecellarrepair.center/services/diagnostic-visit/) ## CellarCool wine cellar cooling units. Service for CellarCool systems when the wine room drifts warm, turns dry or the unit starts and stops every few minutes. [CellarCool wine cellar cooling unit repair](https://winecellarrepair.center/brands/cellarcool/) More CellarCool codes [E1](https://winecellarrepair.center/error-codes/cellarcool-e1/) [E2](https://winecellarrepair.center/error-codes/cellarcool-e2/) [E10](https://winecellarrepair.center/error-codes/cellarcool-e10/) [EA](https://winecellarrepair.center/error-codes/cellarcool-ea/) [AH1](https://winecellarrepair.center/error-codes/cellarcool-ah1/) [AL1](https://winecellarrepair.center/error-codes/cellarcool-al1/) [Ad2](https://winecellarrepair.center/error-codes/cellarcool-ad2/) [dEF](https://winecellarrepair.center/error-codes/cellarcool-def/) Power and controller on other makes [WhisperKOOL E7](https://winecellarrepair.center/error-codes/whisperkool-e7/) [Wine Guardian !4](https://winecellarrepair.center/error-codes/wine-guardian-alarm-4/) [Wine-Mate CA](https://winecellarrepair.center/error-codes/wine-mate-ca/) [All 6 codes of this kind](https://winecellarrepair.center/error-codes/#family-power) CellarCool builds this ### Through-the-wall cellar cooling unit A self-contained box set into an opening in the cellar wall: its cold face blows into the wine room, and its warm face breathes out into the room next door. CellarCool builds this ### Ducted cellar cooling unit A self-contained cooling unit placed outside the cellar, in a mechanical room, attic or basement, that sends chilled air in and takes return air back through insulated ducts. CellarCool builds this ### Split-system cellar cooling An evaporator inside or beside the cellar and a condensing unit outside or in another room, joined by an insulated copper line set and charged on site. ## In CellarCool's own words > No communication between keypad and circuit board for 60 seconds [CellarCool CM2500 (Ceiling Mount split) manual, version 4 (02/2022)](https://www.cellarcool.com/wp-content/uploads/2022/02/CC_CM2500_Manual_110V_022522.pdf) [CellarCool CM2500 (Ceiling Mount split) manual, version 4 (02/2022)](https://www.cellarcool.com/wp-content/uploads/2022/02/CC_CM2500_Manual_110V_022522.pdf) [CellarCool Ultimate Series (3300-R, 4400-R, 8800-R) owner's manual (01/2024)](https://www.cellarcool.com/wp-content/uploads/2024/10/CC-Ultimate-R-OM-012224-1.pdf) Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. CellarCool split, Ceiling Mount and fully ducted Ultimate controllers (CM2500, 3500-S/5000-S, Ultimate-R manuals). The CX through-the-wall series does not list this code. ## CellarCool E7 wine cellar cooling unit 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. 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Check the display cable where it plugs into the keypad. If it comes back, it needs a visit. ### Can I move my CellarCool keypad to fix E7? Moving it does not help unless the cable itself was damaged on the old route. The fix is a sound cable and good plugs at both ends. ### Does E7 on a CellarCool stop cooling? Not necessarily. The keypad has lost the board, but the board may keep running the unit. ### Which CellarCool models can show E7? Models with the separate keypad: Ceiling Mount, split and Ultimate units. The CX through-wall controller does not list it. --- **[Read on the site: CellarCool E7: no signal between the keypad and the board](https://winecellarrepair.center/error-codes/cellarcool-e7/)** **[Book a visit with WineCellarRepair.center](https://winecellarrepair.center/schedule/)**