Bosch IDS 2.0 User Manual

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Bosch IDS 2.0 Service Manual
07.2021 | Bosch Thermotechnology Corp.
Data subject to change
12.3.11 P2/H5 Troubleshooting
LED display output: P2/H5
Description: Low pressure protection
Possible causes:
 Poor heat exchange on coil (cooling mode – indoor coil, heating mode – outdoor coil)
 Fan motor failure (cooling mode – indoor fan, heating mode – outdoor fan)
 Service valves not open
 TXV/EEV/filter drier blocked
 Under charged
Table 39
Procedure:
Figure 26
P2 occurs 5 times in
100 minutes
Ye s
Ye s
H5 displayed, hard lockout
No
P2 error code
System hard shut down
Power on unit
Is there still a fault
code displayed?
No
No service required
Is there still low
pressure?
Ye s
Is the system
undercharged?
Ye s
Follow IOM to adjust
refrigerant
No
Did the pressure
transducer fail?
Ye s
Replace PT
No
Restart system
Check for abnormal
pressure
No
1) See Section 13.1
2) See Section 13.2

Bosch IDS 2.0 Specifications

General

Brand	Bosch
Model	IDS 2.0
Category	Heat Pump
Language	English