McQuay MDS 150B User Manual

74 Service Manual SM-MDS_(ii)
Outdoor pressure sensor error
Error Code: Decorative Error code #5, H5, L2, 35, 42 (For MC301), ER76 and ER77 (For MDS-M PCB)
Is the wire connection
to pressure sensor broken?
Replace the wire and restart the
system
NO
YES
Replace PCB
Turn off the unit
Is the resistance of the
pressure sensor normal?
Refer Appendix 7.3
NO
Replace the sensor and restart
the system
YES
NO
YES
Fix the port/replace PCB and
restart the system
Check the HS/LS port
on outdoor PCB. Normal?
6

McQuay MDS 150B Specifications

General

Brand	McQuay
Model	MDS 150B
Category	Compressor
Language	English