McQuay MDS 100B - Page 83

Service Manual SM-MDS_(ii) 77
Compressor overload
Error Code: Decorative Error code #7, H0 to H3, 30 to 33 (For MC301), H2 to H3 (For MDOM PCB), ER48 to
ER51 (For MDS-M PCB)
Is the overload protector
current setting correct?
Refer wiring diagram.
Reset and restart the system
YES
NO
Replace overload protector
and restart the system
Turn off the unit
Is the refrigerant
charge within spec?
NO
Recharge refrigerant accordingly
and restart the system
YES
6
Is the compressor
resistance normal?
Replace compressor
YES
NO