Bosch IDS 2.0 User Manual

Service Manual Bosch IDS 2.0 | 59
Bosch Thermotechnology Corp. | 07.2021
Data subject to change
12.3.18 AtL Troubleshooting
LED display output: AtL
Description: Ambient Temperature Limited Condition
Possible causes:
 Ambient temperature beyond operating range
 Incorrect O/B thermostat setting
 T4 sensor fault
Table 46
Procedure:
Figure 33
Restart system
Replace T4 sensor
Yes
No
Yes
No service required. Wait
for temperature to be within
range
Correct thermostat setting
No
Yes
Is the ambient
temperature
beyond operating
range? 
Is the thermostat
set to energize O/B
in heating mode?
No
Did the T4 sensor
fail? 
1) Cooling:15~125°F, Heating:-4~86°F
2) See Section 13.4

Bosch IDS 2.0 Specifications

General

Refrigerant	R-410A
Stages	Variable
Voltage	208/230 V
System Type	Air Source Heat Pump
Compressor Type	Inverter-driven
Sound Level	As low as 56 dB
Heating Capacity	Varies by model
Cooling Capacity	Varies by model
Noise Level	45 dB to 60 dB
Operating Temperature Range (Heating)	-20°C to 35°C
Dimensions (Outdoor Unit)	Varies by model
Weight (Outdoor Unit)	Varies by model
Seasonal Coefficient of Performance (SCOP)	Not Available