Robur GAHP Line AR Series, Installation, Use And Maintenance Manual

Page: 97 / 100

GAHP-AR – Installation, start-up, use and maintenance manual
94
Edition: 2014-08
E 644
EVAPORATOR TEMPERATURE SENSOR DEFECTIVE
CODE GENERATED BY : Fault (interruption or short circuit) on evaporator temperature sensor.
RESET METHOD : Reset may be performed via S61 board, menu 2, Parameter 1 (or via DDC). If the code persists, contact
Robur TAC.
U
646
HIGH HOT INLET WATER TEMPERATURE
CODE GENERATED BY : Hot inlet water temperature higher than upper operating limit of the appliance (if the appliance is in
operation).
RESET METHOD : Reset occurs automatically when the condition that generated the code ceases. If the code persists,
contact Robur TAC.
U
647
LOW HOT INLET WATER TEMPERATURE
CODE GENERATED BY
: Hot water temperature lower than lower operating limit of the appliance (if the appliance is in operation).
RESET METHOD
: Reset occurs automatically when the condition that generated the code ceases. If the code persists,
contact Robur TAC.
E 647
LOW HOT INLET WATER TEMPERATURE
CODE GENERATED BY
: U 647 code generated 3 times in 1 hour with the circulator on.
RESET METHOD : In " Heating mode", reset occurs automatically when the condition that generated the code ceases. If the
code persists, contact Robur TAC
.
U
648
HIGH HOT WATER DIFFERENTIAL TEMPERATURE
CODE GENERATED BY
: High hot water differential temperature.
RESET METHOD : Reset occurs automatically 20 minutes after the code is generated. If the code persists, code E648 may
occur (in this case, contact Robur TAC).
E 648
HIGH HOT WATER DIFFERENTIAL TEMPERATURE
CODE GENERATED BY :
U
648 code is generated 2 times in 2 hours of operation.
RESET METHOD : Reset may be performed via S61 board, menu 2, Parameter 1 (or via DDC). If the code persists, contact
Robur TAC.
E 649
"AR10" SATELLITE BOARD NOT PRESENT
CODE GENERATED BY : Satellite board not present.
RESET METHOD : Reset occurs automatically when the condition that generated the code ceases.
U
651
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 (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 (in this case the circulator switches off), or if the
function itself is disabled.
U
652
DEFROSTING FUNCTION ACTIVATED
CODE GENERATED BY : Defrosting function activated.
Defrosting is activated if at least one hour has passed since the last defrosting, if the flame control unit
has been on for at least 20 minutes, and if ambient temperature, temperature of hot inlet water and of the
evaporator require its execution.
RESET METHOD : The code clears automatically when execution of defrosting ends.