Danfoss AK-CC 550A Gebruiksaanwijzing - Pagina 13

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Fault message

In an error situation the LED's on the front will flash and the alarm relay will be

activated. If you push the top button in this situation you can see the alarm

report in the display.

There are two kinds of error reports - it can either be an alarm occurring dur-

ing the daily operation, or there may be a defect in the installation.

A-alarms will not become visible until the set time delay has expired.

E-alarms, on the other hand, will become visible the moment the error occurs.

(An A alarm will not be visible as long as there is an active E alarm).

Here are the messages that may appear:

Code / Alarm

Description

text via data

communication

A1/--- High t.alarm

High temperature alarm

A2/--- Low t. alarm

Low temperature alarm

A4/--- Door alarm

Door alarm

A5/--- Max hold time The "o16" function is activated during

a coordinated defrost

A10/--- Inject prob.

Control problem

A11/--- No Rfg. sel.

No refrigerant selected

A13/--- High temp

Temperature alarm. High S6

A14/--- Low temp S6 Temperature alarm. Low S6

A15/--- DI1 alarm

DI1 alarm

A16/--- DI2 alarm

DI2 alarm

A45/--- Standby

Standby position (stopped refrigera-

mode

tion via r12 or DI input)

A59/--- Case clean

Case cleaning. Signal from DI input

--- AD fault

Error in the adaptive defrost function

--- AD Iced

Evaporator is iced up. Reduction of

air flow

--- AD not defr.

Defrost of evaporator is not

satisfactory

--- AD flashgas.

Flash gas is formed at the valve

E1/--- Ctrl. error

Faults in the controller

E6/--- RTC error

Check clock

E20/--- Pe error

Error on pressure transmitter Pe

E24/--- S2 error

Error on S2 sensor

E25/--- S3 error

Error on S3 sensor

E26/--- S4 error

Error on S4 sensor

E27/--- S5 error

Error on S5 sensor

E28/--- S6 error

Error on S6 sensor

E37/--- S5 error B

Error on S5B sensor

---/--- Max Def.Time

Defrost stopped based on time in-

stead of, as wanted, on temperature

Data communication

The importance of individual alarms can be defined with a setting. The setting

must be carried out in the group "Alarm destinations"

Settings from

System manager

AKM (AKM destination)

High

Middle

Low

Log only

Disabled

AK-CC 550A - 084B8070

Alarm relay

groups (P41)

Log

Instructions RI8PR102 © Danfoss 6/2012

Operating status

The controller goes through some regulating situa-

tions where it is just waiting for the next point of the

regulation. To make these "why is nothing happening"

situations visible, you can see an operating status on

the display. Push briefly (1s) the upper button. If there is

a status code, it will be shown on the display. The indi-

vidual status codes have the following meanings:

Normal regulation

Waiting for end of the coordinated defrost

When the compressor is operating it must run for at least

x minutes.

When the compressor is stopped, it must remain stopped

for at least x minutes.

The evaporator drips off and waits for the time to run out S4

Refrigeration stopped by main switch. Either with r12 or

a DI-input

Refrigeration stopped by thermostat

Defrost sequence. Defrost in progress

Defrost sequence. Fan delay — water attaches to the

evaporator

Refrigeration stopped due to open ON input or stopped

regulation

Door is open. DI input is open

Melt function in progress. Refrigeration is interrupted

Modulating thermostat control

Emergency cooling due to sensor error

Regulation problem in the injections function

Start-up phase 2. Evaporator being charged

Adaptive control

Start-up phase 1. Signal reliability from sensors is

controlled

Manual control of outputs

No refrigerant selected

Case cleaning

Forced cooling

Delay on outputs during start-up

Heat function r36 is active

Other displays:

The defrost temperature cannot be displayed. There is

stop based on time

Defrost in progress / First cooling after defrost

Password required. Set password

Regulation is stopped via main switch

*) Emergency cooling will take effect when there is lack of signal from a defined

S3 or S4 sensor. The regulation will continue with a registered average cutin

frequency. There are two registered values – one for day operation and one for

night operation.

Alarm relay

Non

High

Low-High

S10

S11

S14

S15

S16

S17

S18

S19

S20

S21

S22

S23

S24

S25

S26

S29

S30

S32

S33

non

-d-

OFF

Send via

Network

(Measurement)

Ctrl. state:

(Shown in all

menu displays)