Supreme Error Codes

Error 1 occurs during the second vacuum conditioning stage, when the system is simultaneously heating the chamber to an intermediate temperature while the vacuum pump evacuates it. The control system detected that the chamber temperature was above the expected intermediate level while the chamber pressure remained substantially higher than the minimum required for satisfactory vacuum conditioning at that temperature. This combination indicates the vacuum pump is unable to draw the chamber to the required level under operating conditions.

Error 2 occurs at the conclusion of the first vacuum conditioning stage. After the designated pump-down period has elapsed, the control system checks whether sufficient vacuum has been achieved. This error fires when residual chamber pressure is higher than the permitted limit at the end of that timed period. The first vacuum stage is primarily intended to remove air from the chamber at near-ambient temperature; failure at this stage indicates a fundamental pump or seal issue.

Error 3 occurs during the 134 °C sterilization hold phase. When chamber pressure rises above the upper regulation threshold, the system automatically attempts to reduce pressure by briefly pulsing the vent valve open and closed for up to thirty seconds. If, after this pressure-relief cycle has completed, chamber pressure is still at or above the absolute maximum safe limit, Error 3 is triggered. This indicates the vent valve is unable to discharge pressure rapidly enough, or that steam generation is excessive.

Error 4 occurs during the drying phase. In drying mode, the chamber temperature is regulated at a lower set-point than sterilization, and the chamber should be at low pressure with steam evacuated. This error fires when chamber temperature is above the maximum permissible for the drying phase while residual chamber pressure is above a minimum threshold, indicating that steam is still present. The drying condition cannot be met while the chamber contains pressurised steam.

Error 5 is common to both the 121 °C and 134 °C sterilization cycles. It fires during the sterilization hold phase when chamber pressure drops below the minimum required to maintain saturated-steam sterilization conditions. At the temperatures involved, adequate pressure is essential to maintain the steam saturation state necessary for sterilization efficacy. A pressure below the minimum limit during the hold means the sterilization is not proceeding correctly.

Error 6 occurs during the third vacuum conditioning stage, which is applied in cycles that require more thorough pre-sterilization air removal. The chamber is at a higher intermediate temperature during this stage compared to Stage 2. The control system detected that the chamber temperature exceeded the intermediate threshold while the chamber pressure remained above the required minimum vacuum level. The third vacuum stage requires more aggressive pump performance than the second; failure here indicates a more severe pump or seal problem, or condensate loading.

Error 7 occurs at the conclusion of the second vacuum conditioning stage. After the designated pump-down period following achievement of the second-stage pressure threshold, the control system verifies that residual pressure has fallen to an acceptable level. This error fires when pressure at the end of that countdown period remains above the permitted limit. This indicates the pump has been unable to complete the required evacuation despite having reached the pressure target.

Error 8 is structurally identical to Error 7 but occurs at the conclusion of the third vacuum conditioning stage. This is the most demanding of the three vacuum stages; the chamber is at its highest pre-sterilization temperature, and the pump must maintain draw-down to the required level throughout the designated countdown period.

Error 10 is a continuously active safety sentinel that monitors two independent conditions throughout the entire sterilization cycle. It fires in response to either an absolute thermal limit being exceeded or a critical pressure limit being sustained. It cannot be disabled or bypassed by any other operating state. **First condition — Thermal:** The temperature measurement has exceeded the absolute maximum for any operating phase, indicating a catastrophic thermal event. Alternatively, when the system is known to be in an active thermal state (the second vacuum stage and beyond), the temperature has fallen below a threshold well below any normal operating value, indicating sensor failure, heater failure, or catastrophic heat loss. **Second condition — Pressure:** Chamber pressure has exceeded the absolute maximum safe pressure limit and has remained at or above this limit for four consecutive monitoring intervals (approximately four seconds). The sustained-duration requirement distinguishes a genuine over-pressure condition from a momentary sensor transient.

Error 11 is the 121 °C sterilization equivalent of Error 3. During the 121 °C hold, when chamber pressure rises above the upper regulation threshold, the system attempts automatic pressure reduction by pulsing the vent valve for up to thirty seconds. If pressure remains above the maximum permissible limit after this relief cycle completes, Error 11 is triggered. The threshold for this error is lower than for Error 3, corresponding to the lower expected saturation pressure at 121 °C.

Error 12 fires when the chamber temperature rises beyond the safe upper limit for the 121 °C cycle during either the pre-sterilization heating phase or the sterilization hold phase. To eliminate false alarms from transient sensor noise, the control system waits five seconds after first detecting the over-temperature condition before re-checking. Error 12 is declared only if the over-temperature condition persists through this five-second delay.

Error 13 is structurally identical to Error 12 but applies to the 134 °C cycle, with a correspondingly higher permissible temperature ceiling before the error is declared. As with Error 12, the condition must persist through a five-second confirmation delay before shutdown occurs.

Error 14 fires during the pre-sterilization heating phase, before the chamber has reached the required minimum sterilization pressure. The control system detected that the chamber temperature had risen to a level where pressure should be building, but chamber pressure remains substantially below the minimum expected value. This indicates the chamber is heating without the presence of adequate water or steam — a condition that can damage the chamber, load, or sensor components if sustained.