Bosch IDS 2.0 - Page 41

Service Manual Bosch IDS 2.0 | 41
Bosch Thermotechnology Corp. | 07.2021
Data subject to change
Limited Condition
Status code
Fault Code Fault Code Description Potential Cause
P2/H5 Low pressure protection.
 Poor heat exchange on coil
 Fan motor failure
 Service valves not open
 TXV/EEV/filter drier blocked
 Under charged
C** P3 Compressor over current protection.
 Poor heat exchange on coil
 Fan motor failure
 Service valves not open
 TXV/EEV/filter drier blocked
 Over charged.
 Control board or compressor issue
d** P4 High compressor discharge temperature (T5) protection.
 Poor heat exchange on coil
 Fan motor failure
 Service valves not open
 TXV/EEV/filter drier blocked
 Over charged
L** P5 Condenser coil temperature (T3) protection in cooling.
 Poor heat exchange on coil
 Fan motor failure
 Service valves not open
 TXV/EEV/filter drier blocked
 Over charged
P8 DC outdoor fan motor protection.
 Severe weather (fan running in standby mode due to
high wind)
PH Low discharge superheat protection.
 Poor heat exchange on coil
 Fan motor failure
 Service valves not open
 TXV/EEV/filter drier blocked
 Under charged
L0-L9 The IPM module protection.
 Control board failed
 Compressor failed
 Abnormal pressure
AtL Ambient Temperature Limited Condition.
 Ambient temperature beyond operating range
 Incorrect O/B thermostat setting
 T4 sensor fault
P** Running indication under compressor ratio limited condition  Low temperature and low load
|- Force Mode
 Force button was pressed on outdoor unit, forcing
100% compressor capacity
A Oil return mode  Long compressor operation time
dF Defrost mode  Outdoor coil freezes
Table 28 Fault code and system protection status table
** If the fi rst digit shown on the control board LED is one of the following Limited Condition Status codes
(followed by two numerical digits which show the current compressor frequency in Hz), the unit will continue
to run but in a limited condition. The only exception is when the system is in defrost mode, which only
displays "dF" (without any numerical digits following).