S-Klima CompTrol, Technical Manual

Page: 105 / 126

CompTrol Interface V4.0.x | Issue 21-05-2021 | 1000932 105
Error codes
Error code Error Description and remedy
E2 Incorrect message
length
Breakdown in communication between an indoor unit and the
CompTrol Interface. There may be bus users that are not commu-
nicating via the MHI protocol (X/Y).
Remedy:
–
Reboot the system, see “Rebooting the system” on page 106 .
E3 Checksum error Breakdown in communication between an indoor unit and the
CompTrol Interface. There may be bus users that are not commu-
nicating via the MHI protocol (X/Y).
Remedy:
–
Reboot the system, see “Rebooting the system” on page 106 .
E4 Parity error Breakdown in communication between an indoor unit and the
CompTrol Interface. There may be bus users that are not commu-
nicating via the MHI protocol (X/Y).
Remedy:
–
Reboot the system, see “Rebooting the system” on page 106 .
E5 SIO offline No data received or sent.
Remedy:
–
Reboot the system, see “Rebooting the system” on page 106 .
E6 Buffer overflow Breakdown in communication between an indoor unit and the
CompTrol Interface. There may be bus users that are not commu-
nicating via the MHI protocol (X/Y).
Remedy:
–
Reboot the system, see “Rebooting the system” on page 106 .
E8 Transmitter voltage
error
Error can only occur in conjunction with the resistive circuit, see
“5.1.3 Resistive circuit” on page 24 .
Remedy:
–
Check resistance values at the analog input.
R1+R2 = 5.1 kΩ.
–
Reboot the system, see “Rebooting the system” on page 106 .
OH Overheat/temperature
limit alarm
Error can only occur in program 3. This error is displayed continu-
ously while the set temperature limit value is exceeded.
Temperature limit monitoring is also active if the indoor unit is
switched off.
Remedy:
–
Check the efficacy of the air conditioning system.
Table 74: CompTrol Interface error codes