I am getting these errors, I have a four floor building and when I tried to raise the temperature for floor 4, It still gave me same error.

asked 2020-04-17 16:15:08 -0500

Rwadhwa910 gravatar image

updated 2020-04-17 17:36:57 -0500

Any help would be great.

** Warning ** SimHVAC: Maximum iterations (20) exceeded for all HVAC loops, at College Station Easterwood Fl TX USA TMY3 WMO#=722445, 01/15 19:08 - 19:15
**   ~~~   ** The solution for one or more of the Air Loop HVAC systems did not appear to converge
**   ~~~   ** Air System Named = LANGFORD F4_Z1_VAV1 did not converge for mass flow rate
**   ~~~   ** Check values should be zero. Most Recent values listed first.
**   ~~~   ** Demand-to-Supply interface mass flow rate check value iteration history trace: 5.745895,5.836518,3.701269,3.610646,5.745895,5.836518,3.701269,3.610646,5.745895,5.836518,
**   ~~~   ** Supply-to-demand interface deck 1 mass flow rate check value iteration history trace: 0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,
**   ~~~   ** Air System Named = LANGFORD F4_Z1_VAV1 did not converge for temperature
**   ~~~   ** Check values should be zero. Most Recent values listed first.
**   ~~~   ** Demand-to-Supply interface temperature check value iteration history trace: 0.000000,1.421085E-014,7.105427E-015,7.105427E-015,0.000000,1.421085E-014,7.105427E-015,7.105427E-015,0.000000,1.421085E-014,
**   ~~~   ** Supply-to-demand interface deck 1 temperature check value iteration history trace: 1.232919,1.388355,1.248185,1.092749,1.232919,1.388355,1.248185,1.092749,1.232919,1.388355,
**   ~~~   ** Air System Named = LANGFORD F4_Z1_VAV1 did not converge for energy
**   ~~~   ** Check values should be zero. Most Recent values listed first.
**   ~~~   ** Demand-to-Supply interface energy check value iteration history trace: 155988.445348,158448.659781,100481.324411,98021.109977,155988.445348,158448.659781,100481.324411,98021.109977,155988.445348,158448.659781,
**   ~~~   ** Supply-to-demand interface deck 1 energy check value iteration history trace: -9038.512848,2035.602785,-6472.331239,1701.693002,-9038.512848,2035.602785,-6472.331239,1701.693002,-9038.512848,2035.602785,
**   ~~~   ** Node named F4-Z1 SUPPLY INLET shows oscillating mass flow rate across iterations with a repeated value of 1.549752
**   ~~~   ** Node named F4-Z1 SUPPLY INLET mass flow rate [kg/s] iteration history trace (most recent first): 1.549752,1.459129,1.549752,1.459129,1.549752,1.459129,1.549752,1.459129,1.549752,1.459129,
**   ~~~   ** Node named F4-Z1 SUPPLY INLET shows oscillating temperatures across iterations with a repeated value of 25.479399
**   ~~~   ** Node named F4-Z1 SUPPLY INLET temperature [C] iteration history trace (most recent first): 25.479399,25.323963,25.479399,25.323963,25.479399,25.323963,25.479399,25.323963,25.479399,25.323963,
** Warning ** SimHVAC: Maximum iterations (20) exceeded for all HVAC loops, at College Station Easterwood Fl TX USA TMY3 WMO#=722445, 01/17 01:30 - 01:45
**   ~~~   ** The solution for one or more of the Air Loop HVAC systems did not appear to converge
**   ~~~   ** Air System Named = LANGFORD F4_Z1_VAV1 did not converge for mass flow rate
**   ~~~   ** Check values should be zero. Most Recent values listed first.
**   ~~~   ** Demand-to-Supply interface mass flow rate check value iteration history trace: 2.771039,2.364487,4.904607,5.311160,2.771039,2.364487,4.904607,5.311160,2.771039,2.364487,
**   ~~~   ** Supply-to-demand interface deck 1 mass flow rate check value iteration history trace ...
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