Error Display - Mitsubishi Electric AHU-KIT-SP Manual

13. Error display

AHU interface detects the following errors.
To check the error code, remote control or Modbus device is required.
To detect abnormalities in the AHU interface (including the outdoor unit), either the digital output, remote control or Modbus device must be connected.
Be sure to connect either the digital output, remote control or Modbus for safe system use.
Note: in cascade control, Modbus communication is required to check the individual abnormal state of slave.
When an error occurs, LED 2 (red) on the interface blinks as shown in the table below.
Error code Error contents
E1 AHU interface - remote control communication error
E2 AHU interface address overlap
E3 AHU interface - outdoor unit address pairing error
E5 AHU interface - outdoor unit communication error
E6 Heat exchanger sensor disconnection
E7 Return air sensor disconnection
E8 Heating overload error
E14 Master - slave communication error
E63 Emergency stop
* The cycle is 5 seconds (blinking 0.5 seconds).
Recovery condition
Normal reception of remote control signal
Resolution of address overlap
Resolution of address paring
Normal reception of outdoor unit signal
Resolution of disconnection
Resolution of disconnection
Normalisation of heat exchanger temperature
Normal reception of slave signal
Emergency stop release
LED2 display (red) *
Indeterminate
Once
Twice
Twice
Once
Once
Once
Three times
Continuous
MODEL NAME
Air Handling Unit Interface
MODEL TYPE
AHU-KIT-SP
ISSUE CLASSIFICATION
SPECIFICATION
MORIKAWA
DWG NO.
PSZ000Z308
21.09.17
REV.MARK PAGE
34/38