Alarm Code - Danfoss ERC 21 Series User Manual

Electronic refrigeration control, type ERC 21X

Alarm code

In an alarm situation the display will alternate between readout of the actual air temperature and readout of the
alarm codes of active alarms. Various alarm codes and their descriptions are as below.
Table 37: Alarm codes
Code Alarms
E29 Sair sensor error
E27 Def sensor error
E30 Sc sensor error
A01 High temp alarm
A02 Low temp alarm
A99 High Volt alarm
AA1 Low Volt alarm
A61 Condenser alarm
A80 Cond. block alarm
A04 Door alarm
A15 DI Alarm
A45 Standby Alarm
(1) (1)
The condenser block alarm can be reset by setting r12 Main switch OFF and ON again or by powering down the controller. The condenser block alarm can be reset by setting r12 Main switch OFF and ON again or by powering down the controller.
© Danfoss | Climate Solutions | 2023.01
Description
Air temperature sensor is defect or electrical connection is lost
S5 Evaporator sensor is defect or electrical connection is lost
Sc Condenser sensor is defect or electrical connection is lost
Air temperature in cabinet is too high
Air temperature in cabinet is too low
Supply voltage is too high (compressor protection)
Supply voltage is too low (compressor protection)
Condenser temp. too high - check air flow
Condenser temp. too high - manual reset of alarm required
Door has been open for too long
External alarm from DI input
Control has been stopped by "r12 Main switch"
(1)
BC194286421698en-000901 | 30