VAVTemplate-Maximum iterations exceeded
Hello,
I got 2645615 Warnings which are same as link text when using HVAC template - ZoneVAVwatercooled for a large building .
My question is that: Even if there are so many warnings, the system doesn't converge for only 07/27 09:30 - 09:40 and 08/18 11:20 - 11:30 and my timestep is 10 min. Could I ignore these warnings? If not, how can i fix this problem?
Thanks=)
More details:
* Warning * SimHVAC: Maximum iterations (20) exceeded for all HVAC loops, at RUN PERIOD 1, 07/27 09:30 - 09:40 * ~~~ * The solution for one or more of the Air Loop HVAC systems did not appear to converge * ~~~ * Air System Named = VAV SYS1 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: 65.536106,83.211257,23.244115,58.052126,90.984201,27.363113,65.536130,83.211285,23.244115,58.052126, * ~~~ * 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 = VAV SYS1 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: 5.555677E-002,7.269640E-002,1.850951E-002,5.245884E-002,7.519209E-002,2.136337E-002,5.555679E-002,7.269643E-002,1.850951E-002,5.245884E-002, * ~~~ * Supply-to-demand interface deck 1 temperature check value iteration history trace: 1.241118,1.675333,0.419872,1.213315,1.669355,0.470383,1.241119,1.675334,0.419872,1.213315, * ~~~ * Air System Named = VAV SYS1 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: 1713822.876912,2173451.995929,606978.653270,1516346.701414,2378253.912276,714557.723354,1713823.524251,2173452.732933,606978.656808,1516346.706538, * ~~~ * Supply-to-demand interface deck 1 energy check value iteration history trace: 666322.964022,-1039523.438037,250718.781313,653731.204601,-1052064.940010,283512.232175,666323.237488,-1039523.823601,250718.781425,653731.203318,
* Warning * SimHVAC: Maximum iterations (20) exceeded for all HVAC loops, at RUN PERIOD 1, 08/18 11:20 - 11:30 * ~~~ * The solution for one or more of the Air Loop HVAC systems did not appear to converge * ~~~ * Air System Named = VAV SYS1 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: 34.666404,34.205766,36.931524,37.392130,34.666596,34.205498,36.934014,37.384023,34.722262,34.125857, * ~~~ * 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 = VAV SYS1 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: 2 ...
