DeDietrich AWHP 6 MR Installation And Service Manual page 120

8. Troubleshooting
Control system sequence
Status
3 Operation in heating
mode
4 Operating in DHW mode
5 Heat pump shutdown
6 Inside module shutdown
7 Operation in cooling
mode
119
Sub-status
30 normal operation
31 Heat pump off as the temperature is too
high
32 normal operation, Back-up stopped
owing to the bivalency point
33 Normal running with the set point
temperature equal to the minimum flow
temperature to guarantee defrosting
34 Heat pump off owing to the power cut off x
35 Back-up off owing to the power cut off
36 Heat pump off as the outside temperature
is too low
37 Heat pump off owing to a defrosting error
and a flow temperature value of less than
18°C
38 Defrosting
39 Defrosting with flow temperature less
than the minimum threshold permitted
30 normal operation
31 Heat pump off as the temperature is too
high
34 Heat pump off owing to the power cut off
35 Back-up off owing to the power cut off
36 Heat pump off as the outside temperature
is too low
38 Defrosting
40 Heating pump on the heat pump in post-
operation
60 Inside module heating pump in post-
operation
30 normal operation
34 Heat pump off owing to the power cut off x
Heating Domestic hot
water
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x x
x x
x
24/09/2012 - 300027606-001-01
AWHP MIT-IN iSystem
Remarks
The heat pump or
one of the back-ups
at least is running
The heat pump or
one of the back-ups
at least is running
(Except domestic hot
water back-up)
No heating or
domestic hot water
demand
No heating or
domestic hot water
demand