Danfoss ERC 21 Series User Manual

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
Description
E29
Sair sensor error
Air temperature sensor is defect or electrical connection is lost
E27
Def sensor error
S5 Evaporator sensor is defect or electrical connection is lost
E30
Sc sensor error
Sc Condenser sensor is defect or electrical connection is lost
A01
High temp alarm
Air temperature in cabinet is too high
A02
Low temp alarm
Air temperature in cabinet is too low
A99
High Volt alarm
Supply voltage is too high (compressor protection)
AA1
Low Volt alarm
Supply voltage is too low (compressor protection)
A61
Condenser alarm
Condenser temp. too high - check air ow
A80
Cond. block alarm
Condenser temp. too high - manual reset of alarm required
(1)
A04
Door alarm
Door has been open for too long
A15
DI Alarm
External alarm from DI input
A45
Standby Alarm
Control has been stopped by "r12 Main switch"
(1)
The condenser block alarm can be reset by setting r12 Main switch OFF and ON again or by powering down the controller.
(1)
The condenser block alarm can be reset by setting r12 Main switch OFF and ON again or by powering down the controller.
Electronic refrigeration control, type ERC 21X
© Danfoss | Climate Solutions | 2023.01 BC194286421698en-000901 | 30

Danfoss ERC 21 Series Specifications

General

Brand	Danfoss
Model	ERC 21 Series
Category	Controller
Language	English