Commissioning; Operational Faults - Siemens QAA73.210 User Manual

Prerequisites
Room unit
Boiler control does not
switch on
Room temperature
D.h.w.
Siemens
Building Technologies
3

Commissioning

Prior to commissioning the controller, make the following checks:
· Correct mounting
· Correct connection to OpenTherm bus
· Enduser parameters are set as required
· Heating engineer parameters are set in compliance with plant requirements
At first power up or after a long off period (no power supply), "CLOW" is displayed
on the LCD for some minutes.
During this first period it is not possible to visualize or change parameters, the
other functions are running. After some minutes a minimum back-up time is
reached and the full functionality is available
3.1

Operational faults

No display on the room unit:
Is the heating plant's main switch turned on?
· Are the fuses in order?
· Check the wiring
· Boiler controller
Does boiler control really have to operate?
· Press boiler control's lock-out reset button
· Check wiring and fuse of boiler control
· Check the communication link to boiler control
The room temperature does not agree with the required temperature level:
· Does the room temperature setpoint agree with the required temperature level?
· Is the required operating mode indicated?
· Are weekday, time of day and the displayed heating program correct?
(Info displays)
· Has the heating curve slope been correctly set?
· Check wiring of outside sensor
· Has the "Nominal room temperature setpoint" with the "Parallel displacement of
the heating curve" been calibrated based on the effective room temperature?
· Check boiler control
D.h.w. is not being heated:
· Has the button for d.h.w. heating been pressed?
· Check setpoint of the d.h.w. temperature
· Check d.h.w. function of boiler control
Room Unit for Boiler Control
Commissioning
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CE1U2283en
2015-09-16