Installation, Start-Up, Adjustment and Maintenance Manual
75
U
51
ANTIFREEZE FUNCTION ACTIVATED – COOLING MODULE
Activation takes place only if the cold module is off and the antifreeze function is enabled (see menu 1, parameter 77).
CODE GENERATED WHEN
:
Inlet or outlet water temperature of the cold module falls below 39.2 °F (4 °C - the code generated signals
that the antifreeze function has been activated).
In this case the antifreeze function activates the plant water circulator.
RESET METHOD
:
Reset (deactivation of antifreeze function) occurs automatically when, with only the circulator on, the inlet
and outlet water temperatures return to over 41 °F (5 °C - in this case the circulator switches off), or if the
function itself is disabled.
U
77
COLD MODULE FLOW SWITCH "ON"
CODE GENERATED BY
:
The flow switch of the cold module detects that water is present in the plant , when (and only in this
situation) the appliance is configured as a 2-pipe cold-hot plant and the plant is operating in hot mode at
that moment.
The code (
U
77) is disabled when the antifreeze function is active.
RESET METHOD
:
Reset occurs automatically when the condition that generated the code ceases.
ELECTRONIC BOARD
U
80
INCOMPLETE PARAMETERS
CODE GENERATED BY
: Incomplete
parameters.
RESET METHOD
:
The code remains active until operating parameters have been entered and completed. Contact ROBUR
TAC.
NB: If the board is replaced, code E80 may appear: this means that AY/AYF characterisation data has not been entered.
E 80
INVALID PARAMETERS
CODE GENERATED BY
:
Invalid parameters or damage to parameter memory.
RESET METHOD
:
Reset is automatic when the correct parameters are entered.
If the code persists, contact the ROBUR TAC: if the parameters are incorrect, it is necessary to enter and
complete the operating and characterisation parameters; if the memory is damaged it is necessary to
replace the board.
U
81
-
U
82
INVALID BANK 1 DATA - INVALID BANK 2 DATA
CODE GENERATED BY
:
Invalid Bank 1 data - Invalid Bank 2 data.
RESET METHOD
:
Reset occurs automatically 5 seconds after the code is generated.
E 81
-
E
82
INVALID BANK 1 DATA - INVALID BANK 2 DATA
CODE GENERATED BY
:
Invalid Bank 1 data - Invalid Bank 2 data.
RESET METHOD
:
Reset may be performed via the S61/AY10 board via menu 2, parameter 1 or 21.
If the code persists, contact ROBUR TAC.
E 84
FAULTY CONNECTIONS OF 24 Vac TRANSFORMER OR FUSES
CODE GENERATED BY
:
Damage to 1 of the 2 24-0-24 Vac input fuses or one of 24-0-24 Vac wires to the board not supplying
current.
RESET METHOD
:
Check 24-0-24 Vac fuses and electrical power connections on the board. Reset may be carried out via
DDC (or via S61 board via menu 2, menu item 1). If the code persists or occurs again, contact ROBUR
TAC.