Further Information - Danfoss AK-PC 420 Instructions

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
Use of S8
On: for regulation
Off: for monitoring
Service etc.
Status on relay 1 (fan 1)
Status on relay 2 (fan 2)
Status on relay 3 (fan 3)
Status on relay 4 (fan 4)
Status on relay 5 (fan 5)
Status on relay 6 (fan 6)
Status on relay 7 (pump 1)
Status on relay 8 (pump 2)
Status on relay 9 (heat recovery)
Status on relay 10 (alarm)
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
Pump setting. Operating time with
two pumps when switching takes
place.
Pump setting. After the operating
time you then switch over to the other
pump.
Status on DI1 input
Status on DI2 input
Read temperature at sensor "Sc3"
Status on DI3 input
Status on DI4 input
Status on DI5 input
Read temperature at sensor "S8"
Status on "Flow switch"-input
Read reference displacement from the
external signal
Read the value of the analogue output
in V
Read temperature at sensor "S7"
Factory settings are indicated for standard units (see code numbers, page 1). Other
code numbers have customized settings.

Further information:

Manual: RS8EL
AK-PC 420
o61 1 6 1
o96 Off/0 On/1 Off/0
p25
p26
p27
p28
p29
p30
p31
p32
p33
p34
p35 0 5 1
p36 0 s 60 s 10 s
p37 1 h 500 h 24 h
u10
u37
u44 °C
u87
u88
u89
u93
u94
u96
u97
u98
Instructions RI8LP652 © Danfoss 03/2010
The controller can give the following messages
E1 Error Fault in controller
message
E2 Regulation is outside the range, or the control
signal is defective
Alarm
A11 Refrigerant not selected
message
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
Status Refrigeration stopped by the internal or external
S10
message start/stop function
S25 Manual control of outputs
Access code is required before you have access to
PS Info
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
Regulation Regulation
(o61) sensor
1 S7
2 S7
3 Pc
4 Pc
5 S8
6 S8
Optional 3-way Fan
sensor valve control
S8 (P + PI) x Step
S8 (P + PI) x Speed
S7 / S7+S8 (PI) x Step
S7 / S7+S8 (PI) x Speed
Step
Speed
9