Dunham-Bush ACDS - 4.2.4 IR32 Thermostat Troubleshooting Guide

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4.0 ELECTRICAL
4.2.4 IR32 ELECTRONIC THERMOSTAT TROUBLESHOOTING
Code Description Cause Control Action Reset Remedies
Er0 Sensor error faulty sensor depends on C10 R: automatic
V: manual
Check connection. Check
sensor signal
Er1 Sensor NTC2
error
faulty sensor if C19=1 & Mode
=1 or 2
see Er0
R: automatic
V: manual
Check connection. Check
sensor signal
Er2 Memory error voltage drop
during
programming
stage,
memory
damaged by
electromagnetic
interference
Stoppage R: automatic
V: manual
Reset factory-set values.
Turn off controller, turn on
again holding [PRG/mute]
key
Er3 Alarm via
external contact
on digital input
contact linked to
digital input is
open
depends on C31 R: depends
on C29 &
C30
V: manual
Check C29, C30, C31 &
P28.
Check the external contact
Er4
Er4 High
temperature
alarm
temp > P26 for a
time interval >
P28
Nil R: automatic
V: manual
Check P26, P27 & P28.
Er5 Low
temperature
alarm
temp < P25 for a
time interval >
P28
Nil R: automatic
V: manual
Check P26, P27 & P28.
NOTE:
R = Control action
Resetting the instrument means to restore normal operating conditions after the cause that determinied the alarm has been cleared.
V = Display
Display and buzzer. Display reset means that normal display of usual values is restored.