91InRoom Controller - Operating Instructions
Cause Alarm message Effect
LP switch/LP threshold passed under LOW PRESSURE 1 Compressor 1 off, compressor 2 on,
if present
HP switch/HP threshold exceeded
Internal compressor power switch
COMP 1 FAILURE/HP
Compressor 1 off, compressor 2 on,
if present
LP switch/LP threshold passed under LOW PRESSURE 2 Compressor 2 off, compressor 1 on
HP switch/HP threshold exceeded
Internal compressor power switch
COMP 2 FAILURE/HP Compressor 2 off, compressor 1 on
Temperature switch/heating MCB E-HEAT # FAILURE
Heating # off
Humidifier MCB HUMIDIFIER # FAIL Humidifier # off
Airflow differential switch AIRFLOW FAILURE #
all components off
Filter differential switch FILTER ALARM no direct effect*
External alarm signal
EXTERNAL ALARM # no direct effect*
Conductivity >5µS HUMIDIFIER # 5µS no direct effect*
Conductivity >20µS HUMIDIFIER # 20µS Ultrasonic humidifier off
Glycol pump MCB GLYCOL PUMP # FAILURE Compressors & pump off
G-Pump MCB G-PUMP FAILURE Compressors & pump off
GE-Pump MCB GE-PUMP FAILURE Compressors & pump off
Drycooler # MCB DRYCOOLER # FAIL Compressor, pump & drycooler # off
Water detector WATER ALARM Humidifier, dehumidification off
Return air temp. > limit value RETURN AIR TEMP TOO HIGH no immediate effect
Return air humidity > limit value RETURN AIR HUM TOO HIGH no immediate effect
Supply air temp. > limit value SUPPLY AIR TEMP TOO HIGH no immediate effect
Supply air humidity > limit value SUPPLY AIR HUM TOO HIGH no immediate effect
Water temp. > limit value WATER TEMP TOO HIGH no immediate effect
Return air temp. < limit value RETURN AIR TEMP TOO LOW no immediate effect
Return air humidity < limit value RETURN AIR HUM TOO LOW no immediate effect
Supply air temp. < limit value SUPPLY AIR TEMP TOO LOW no immediate effect
Supply air humidity < limit value SUPPLY AIR HUM TOO LOW no immediate effect
Water temp. < limit value WATER TEMP TOO LOW no immediate effect
Fire/smoke detector
FIRE ALARM all components off
Tolerance exceeded
SENSOR # EXCESS faulty sensor # excluded
Measured voltage/current out of defined
range
SENSOR # DEFECT faulty sensor # excluded
7.2 Alarm messages
# stands for a number.
* The corresponding alarm can be cofigured to release a common alarm which can control further equipment by a digital
output.
** The alarm text can be configured.
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