AK-PC
420
Manual RS8EL402 © Danfoss 03-2010
15
Selection of application
Regulation sensor and output are:
1: S7 + 3-way valve + Step of fans
2: S7 + 3-way valve + VSD (speed) of
fans
3: Pc + 3-way valve + Step of fans
4: Pc + 3-way valve + VSD (speed) of
fans
5: S8 + Step of fans
6: S8 + VSD (speed) of fans
o61
1
6
1
Use of S8
On: for regulation
Off: for monitoring
o96
Off/0
On/1
Off/0
Service etc.
Status on relay 1 (fan 1)
p25
Status on relay 2 (fan 2)
p26
Status on relay 3 (fan 3)
p27
Status on relay 4 (fan 4)
p28
Status on relay 5 (fan 5)
p29
Status on relay 6 (fan 6)
p30
Status on relay 7 (pump 1)
p31
Status on relay 8 (pump 2)
p32
Status on relay 9 (heat recovery)
p33
Status on relay 10 (alarm)
p34
Pump control:
0: Both pumps stops
1: Pump 1 only
2: Pump 2 only
3: Both pump 1 and pump 2
4: 2 pumps + rotation. Start before
stop
5: 2 pumps + rotation. Stop before
start
p35
0
5
1
Pump setting. Operating time with
two pumps when switching takes
place.
p36
0 s
60 s
10 s
Pump setting. After the operating
time you then switch over to the other
pump.
p37
1 h
500 h
24 h
Status on DI1 input
u10
Status on DI2 input
u37
Read temperature at sensor "Sc3"
u44
°C
Status on DI3 input
u87
Status on DI4 input
u88
Status on DI5 input
u89
Read temperature at sensor "S8"
u93
Status on "Flow switch"-input
u94
Read reference displacement from the
external signal
u96
Read the value of the analogue output
in V
u97
Read temperature at sensor "S7"
u98
The controller can give the following messages
E1
Error
message
Fault in controller
E2
Regulation is outside the range, or the control
signal is defective
A11
Alarm
message
Refrigerant not selected
A17
High Pc
A28
DI 1 alarm. Terminal 46 interrupted
A29
DI 2 alarm. Terminal 47 interrupted
A30
DI 3 alarm. Terminal 49 interrupted
A34
Fan 1 alarm. Terminal 29 is open
A35
Fan 2 alarm. Terminal 30 is open
A36
Fan 3 alarm. Terminal 31 is open
A37
Fan 4 alarm. Terminal 32 is open
A45
Regulation stopped
A46
Fan 5 alarm. Terminal 33 is open
A47
Fan 6 alarm. Terminal 34 is open
A77
Pump 1 alarm. Terminal 36 interrupted
A78
Pump 2 alarm. Terminal 36 interrupted
A79
Pump 1 and 2 alarm. Terminal 36 interrupted
S10
Status
message
Refrigeration stopped by the internal or external
start/stop function
S25
Manual control of outputs
PS
Info
Access code is required before you have access to
the settings
Messages can be brought up on the display by briefly pressing
the uppermost key. If there is more than one alarm, they can be
scrolled through
Factory setting
If you need to return to the factory-set values, it can be done in
this way:
- Cut out the supply voltage to the controller
- Keep the upper and the lower button depressed at the same
time as you recon nect the supply voltage
Factory settings are indicated for standard units (see code numbers, page 1). Other
code numbers have customized settings.
