When running the heat pump in ECONOMY mode and the ambient temperature does not meet the operational
conditions (allowed operating range) of the unit, that is, the temperature is less than -7°C or more than +43°C, the
unit stops and an LA code will be displayed.
Temp.Set
Warning code when the current mode is in conflict with the operational conditions for this
mode.
ALARM
When an error occurs, the alarm indicator will start flashing.
The user then has two options:
•
User does not operate the unit;
o
If the ambient air temperature stays out of the allowed operating range for a period of more than 20
hours, the unit will automatically start the electrical heater to heat the water to the setpoint value. The unit
will continue to operate the hot water heating using the electrical heater until the ambient air tempera-
ture returns within the allowed operating range.
o
When the ambient air temperature returns within the allowed operating range, the warning code LA is
reset and the unit returns back to normal operation of ECONOMY mode.
•
Switch manually from ECONOMY to E-HEATER mode;
o
This will ensure that enough volume of hot water is supplied.
o
The unit will run in E-HEATER mode, even if the air temperature returns back to the range of -7 to +43°C.
11.3
Troubleshooting
If an error occurs, a buzzer will sound 3 times every other minute and the ALARM indicator will flash quickly. An
error code will be displayed. The buzzer sound can be stopped by pressing CANCEL for several seconds, although
the ALARM indicator will still be flashing.
ALARM
The ALARM indicator will flash quickly if an error occurs.
CANCEL
Press CANCEL to stop the buzzer.
The error code and water temperature are displayed alternatively. Contact your installer for help.
28 – Installation, Service and User Manual VMGFK202
Summary of Contents for DTW 300 SP
Page 1: ...Installation Service and User Manual DTW 300 SP VMGFK202...
Page 4: ......
Page 41: ...VMGFK202...
