Service Manual

Protection Control SiUS281811E
88 Part 4 Functions and Control
Heating operation
&
• Ts – Teg < 8˚C (14.4˚F)
•
Pe
> 0.06 MPa (8.7 psi)
• Pe > 0.09 MPa (13.1 psi)
OR
After 10 secondsPe < 0.17 MPa (24.7 psi)
Pe
< 0.17 MPa (24.7 psi)
Pe
> 0.20 MPa (29.0 psi)
Pe < 0.07 MPa (10.2 psi)
Current step limited
After 15 seconds
Low pressure not limited
Low pressure limited
Compressor upper limit
frequency: 1-step up from
current compressor frequency
Pe: Low pressure sensor detection value
Compressor upper limit
frequency: 3-step down from
current compressor frequency
When occurring 3 times within 30 minutes,
the error code E4
is output.
Pe < 0.12 MPa
(17.4 psi)
Pe > 0.17 MPa
(24.7 psi)
Hot gas bypass valve: OFF
Hot gas bypass valve: ON
Low pressure
standby