Problem with Hot Water Services Modeling!

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I am trying to model HW system but sometimes I get errors regarding controls as described below. When I try a test model, one space building, it works but with my building, there are always errors. I checked out all schedules and setting but no way. Your help is appreciated in advance.

image of my loop:

Program Version,EnergyPlus, Version 8.4.0-832e4bb9cb, YMD=2016.08.16 08:41,IDD_Version 8.4.0
   ************* IDF Context for following error/warning message:
   ************* Note -- lines truncated at 300 characters, if necessary...
   *************   4445 PlantEquipmentOperationSchemes,
   ************* indicated Name=Plant Loop 1 Operation Schemes
   ************* Only last 4 lines before error line shown.....
   *************   4446   Plant Loop 1 Operation Schemes,         !- Name
   *************   4447   PlantEquipmentOperation:HeatingLoad,    !- Control Scheme Object Type 1
   *************   4448   Plant Loop 1 Heating Operation Scheme,  !- Control Scheme Name 1
   *************   4449   ;                                       !- Control Scheme Schedule Name 1
   ** Severe  ** IP: IDF line~4449 Error detected in Object=PLANTEQUIPMENTOPERATIONSCHEMES, name=PLANT LOOP 1 OPERATION SCHEMES
   **   ~~~   ** Field [Control Scheme 1 Schedule Name] is required but was blank
   ** Warning ** IP: Note -- Some missing fields have been filled with defaults. See the audit output file for details.
   ** Severe  ** IP: Blank "required" fields found in input
   ** Severe  ** IP: Out of "range" values and/or blank required fields found in input
   **  Fatal  ** IP: Errors occurred on processing IDF file. Preceding condition(s) cause termination.
   ...Summary of Errors that led to program termination:
   ..... Reference severe error count=3
   ..... Last severe error=IP: Out of "range" values and/or blank required fields found in input
   ************* Warning:  Node connection errors not checked - most system input has not been read (see previous warning).
   ************* Fatal error -- final processing.  Program exited before simulations began.  See previous error messages.
   ************* EnergyPlus Warmup Error Summary. During Warmup: 0 Warning; 0 Severe Errors.
   ************* EnergyPlus Sizing Error Summary. During Sizing: 0 Warning; 0 Severe Errors.
   ************* EnergyPlus Terminated--Fatal Error Detected. 1 Warning; 3 Severe Errors; Elapsed Time=00hr 00min  0.48sec