GRE Comfort Heat AR2094 Manuel D'instructions page 39

The het pump controls the water pump if it is connected. The heat pump will start the water pump every 60 minutes during 5
minutes to check the water temperature. This feature can be modified using parameters F43 and F44.
The controller can connect a switching value as external alarm source (Pin 4, 5), when the external alarm occurs, the controller stops,
displays the alarm code "A11" and generates alarm output. External alarm signal has 5 modes (F50):
· 0: without external alarm
· 1: always open, unlocked
· 2: always open, locked
· 3: always closed, unlocked
· 4: always closed, locked
"Always open" means in normal state, external alarm signal is open, if closed, the controller will give an alarm; "Always closed"
is on the contrary. "Locked" means that when external alarm signal becomes normal, the controller is still in the alarm state, and
it needs to press any key to resume.
A probation time can be set (F87), the controller can add up the running time after power is on, if the accumulative running
time is over the probation time, the controller will stop and display the alarm code A99, if you want to eliminate the limit of
probation time, set the F87 to "OFF", also you can use the F86 to clear the accumulative running time, and you can try to use it
again. The parameter F85 can be used to examine the accumulative running time of the controller (hour).
In order to prevent irrespective persons from changing the parameters, you can set a password (F80), and if you have set a pass-
word, the controller will hint you to enter the password after you press the key "M" for 5 seconds, you must enter the correct pass-
word, and then you can set the parameters. If you don't need the password, you can set F80 to "OFF". Notice that you must
remember the password, and if you forget the password, you can not enter the set state.
6. START-UP PROCEDURE FOR THE UNIT
Operating requirements for the heat pump
· The outdoor temperature must be higher than +5 ºC.
· The heat pump is provided with a defrost thermostat that guarantees the compressor shutdown and the operation of the
defrost system.
· When washing the filter of the filtering pump, it is OBLIGATORY that the heat pump is turned off.
Water Pump Control (if available)
External alarm
Probation time
Password
GRE HEAT PUMP
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