Home
 
 

Known bugs

< Back

The bugs published on this page are mainly computational bugs that affect the calculation results. There should be a bug fix patch for each bug, or at least a plan for when the bug will be fixed.

As a service to our customers we also make patches for other bugs reported to us. We do not publish these patches on this page but send them directly to customers reporting the problem.

 

How to get a patch
To get a download link to a patch and installation instructions, please email us at ice.support@equa.se
Make sure to include the patch number.

 

February 15, 2018

Room units: If an IDA ICE model with a Water Radiator or a Cooling Device is saved as a packed file in an earlier version and then opened in IDA ICE 4.8, the properties of these room units will be changed to the ones of the default device type. This will affect the design power of the room unit. The default device usually has a larger capacity, so this problem has practical consequences mostly when the amount of room unit heat exchange capacity is critical, such as in heat pump applications.

Introduced in IDA ICE 4.8 (patch for IDA ICE 4.8 available)
Patch no: 180215
Will be fixed in the next version of IDA ICE


February 14, 2018

Detailed window: Simulation does not run if the window is tilted slightly downwards (59°<= SLOPEWIND < 89°).

Introduced in IDA ICE 4.8
Will be fixed in the next version of IDA ICE


February 6, 2018

Driving pressure over leaks and openings is always computed as if the zone was well-mixed. There will be an error for zones with a vertical temperature gradient, i.e. when displacement ventilation or given gradient is used in the Climate zone model.

Introduced in IDA ICE 2.0
Will be fixed in IDA ICE 5.0


October 17, 2017

Pumping power: If method ”Performance polynomial: Riding the pump curve” is selected the pumping power is incorrect.

Introduced in IDA ICE 4.7.1 (patch for IDA ICE 4.7.1 available)
Patch no: 171017
Fixed in IDA ICE 4.8


September 29, 2017

Boreholes extension: The pressure drop calculation is not correct. The pressure drop, dp, should be multiplied with 2.

Introduced in Boreholes 1.1
Fixed in Boreholes 4.8


May 2, 2017

Lokalisierung Schweiz: Das SIA 2028 normale „Design Reference Year“ von Pully (städtische Südhanglage westliches Mittelland) ist falsch. Die Daten entsprechen stattdessen denjenigen von der Klimastation Piotta (Tallage Alpensüdseite).

Introduced in Localization Switzerland 4.7 (patch for Localization Switzerland 4.7.1 available)
Patch no: 170502
Fixed in Localization Switzerland 4.8


May 1, 2017

Lokalisierung Schweiz: Wenn im Modell eine wassergeführte Kühlung definiert ist, wird diese für das automatisch erstellte Modell für den Nachweis SIA 180 C.1 „sommerlicher Wärmeschutz“ nicht entfernt. Das Nachweismodell weist somit weiterhin eine Kühlung aus, welche manuell zu entfernen ist.

Introduced in Localization Switzerland 4.7 (patch for Localization Switzerland 4.7.1 available)
Patch no: 170501
Fixed in Localization Switzerland 4.8


April 20, 2017

Window shading on sloped roof windows from imported shading objects is incorrectly calculated. This can potentially lead to errors in the zone heat balance.

Introduced in IDA ICE 4.0
Fixed in IDA ICE 4.8


December 21, 2016

Time-split parallelization: When using time-split parallelization and the simulation period overlaps more than one calendar year, a time-split period may become incorrect if it is wholly within the second year.

Introduced in IDA ICE 4.7
Fixed in IDA ICE 4.8


December 6, 2016

Exhaust air heat recovery (new AHU and corresponding ESBO plant component in 4.7.1):

  • The mass flow in the liquid circuit may become wrong.

  • The design temperature difference parameter in the ESBO plant is not available at the standard level.

  • Design conditions that do not lead to condensation are rejected.

The model still delivers physically correct results, but the design operating point becomes different from that intended.

Introduced in IDA ICE 4.7.1 (patch for IDA ICE 4.7.1 available)
Patch no: 161206
Fixed in IDA ICE 4.8


November 23, 2016

Integrated shadings in the outer window of a double façade:

  • For a venetian blind, the slat angle is always 45°, regardless of set angle.

  • If the control “Sun” is chosen, the shading is always drawn.

  • If the control “Sun AND Schedule” is set, the shading is controlled by the irradiation level on the inside of the window, regardless of what is chosen.

  • If “New custom control” (ShadeCtrlMacro) is chosen and “Combined with built-in light control” is marked, the light control is ignored.

Introduced in IDA ICE 4.7 (patch for IDA ICE 4.7 & 4.7.1 available)
Patch no: 161123
Fixed in IDA ICE 4.8


November 21, 2016

Deutsche Lokalisation, DIN 4108-2 Add-In: Wenn für eine Zone des Ausgangsmodells unter "In Betrieb" die Voreinstellung "Wenn belegt" durch einen Zeitplan ersetzt wird so wird diese Einstellung im DIN 4108-2 Nachweismodel beibehalten. Korrekte Übertemperaturgradstunden erhält man nur wenn im Nachweismodell der Wert wieder auf "wenn belegt" eingestellt wird.

Introduced in Localization Germany 4.6.1 (patch for Localization Germany 4.7.1 available)
Patch no: 161122
Fixed in Localization Germany 4.8


November 21, 2016

Zone multipliers: In the table "Energy balance (sensible only)" in the “Summary” tab, zone multipliers are ignored in the results. In all other summarizing results they are used.

Introduced in IDA ICE 4.7 (patch for IDA ICE 4.7 & 4.7.1 available)
Patch no: 161121
Fixed in IDA ICE 4.8


November 17, 2016

Wall model: When inserting a “Heating/cooling floor” in an edited (complex) roof, an RCWALL model with default parameters (except the area) is wrongly used.

Introduced in IDA ICE 4.0 (patch for IDA ICE 4.7 & 4.7.1 available)
Patch no: 161117
Fixed in IDA ICE 4.8


November 16, 2016

Window area: The area of non-rectangular windows and openings inserted in faces of the building body is not correctly calculated.

Introduced in IDA ICE 4.0 (patch for IDA ICE 4.7 & 4.7.1 available)
Patch no: 161116
Fixed in IDA ICE 4.8


November 15, 2016

Simulation time: When setting the simulation time, the date is switched incorrectly if the starting time is late in the day or the ending time is early in the day.

Introduced in IDA ICE 4.7.1 (patch for IDA ICE 4.7.1 available)
Patch no: 161115
Fixed in IDA ICE 4.8


November 14, 2016

Daylighting: When selecting “Daylighting” in the “Requested output” under the “Simulation” tab, a simplified calculation of the illuminance in zones with an occupant present is performed. When using the detailed window model with an integrated shading that diffuses the light, the solar (total shortwave) properties are used instead of the visual properties for the diffused light. Note that this bug does not affect the daylight calculation performed under the “Daylight” tab.

External shading: When setting the control of an external solar shading to a value in between 1 and 0 (which are the values normally used for on/off), the result deviate from the expected weighted average of the results for 1 and 0.

Miljöbyggnad: The value of “g-syst”, given in “Miljöbyggnad”, includes, when using the standard window, solar heat transferred though the frame, which is not according to the rules of “Miljöbyggnad”.

Introduced in IDA ICE 4.7.1 / 4.0 / 4.7 (patch for IDA ICE 4.7.1 available)
Patch no: 161114
Fixed in IDA ICE 4.8


November 8, 2016

Autosave: The Autosave function does not start to work until after a first simulation has been performed.

Introduced in IDA ICE 4.7 (patch for IDA ICE 4.7 & 4.7.1 available)
Patch no: 161108
Fixed in IDA ICE 4.8


October 18, 2016

Deutsche Lokalisation, DIN 4108-2 Add-In: Bei Nichtwohngebäuden wird der Zeitplan "din41082-7-18 weekdays" konstant als "0" angesetzt, auch wenn wochentags zwischen 07:00 Uhr und 18:00 Uhr der Wert "1" angezeigt wird. Dies hat fundamentale Auswirkungen auf die Berechnung.

Introduced in Localization Germany 4.7.1 (patch for Localization Germany 4.7.1 available)
Patch no: 161103
Fixed in Localization Germany 4.8

 


 


>