Troubleshooting guide

MAGNUM VERSION 8 MANUAL REVISION 3.1
138
12.9. Centrifugal (Centrifugal Comp)
Compressor relay
Part winding compressor relay (OPTIONAL)
Open Vane
Close Vane
Oil pump
Oil heater
Liquid line solenoid (OPTIONAL)
Hot gas bypass (OPTIONAL)
Liquid injection (OPTIONAL)
Fast unloader (OPTIONAL)
Second liquid line solenoid (OPTIONAL)
Oil equalization (OPTIONAL)
Oil seal cooler (OPTIONAL)
Liquid injection #2 (OPTIONAL)
Mod motor (OPTIONAL)
12.10. Mitsubishi Screw (Mitsubishi Screw)
Compressor relay
Part winding compressor relay (OPTIONAL)
Fast unloader
40 % open
70 % open
Liquid line solenoid (OPTIONAL)
Hot gas bypass (OPTIONAL)
Common Hot gas bypass (OPTIONAL)
Liquid injection (OPTIONAL)
Fast unloader (OPTIONAL)
Second liquid line solenoid (OPTIONAL)
Oil equalization (OPTIONAL)
Oil seal cooler (OPTIONAL)
VI increase valve % (OPTIONAL)
VI decrease valve % (OPTIONAL)
Start unloader bypass (OPTIONAL)
Low disc superheat (OPTIONAL)
Hot gas reheat off (OPTIONAL) If hot gas reheat all 3 hot gas relays are required.
Hot gas reheat on (OPTIONAL)
Hot gas reheat bleed (OPTIONAL)
Third liquid line solenoid (OPTIONAL)
Reversing valve (heat pump) (OPTIONAL)
Liquid injection #2 (OPTIONAL)
Mod motor (OPTIONAL)
12.11. Trane Scroll with 3 Compressor Sets (Trane Trio)
Staging sequence
COMP A COMP B COMP C
Stage 1
OFF OFF ON
Stage 2
ON ON OFF
Stage 3
ON ON ON
Compressor relay for COMP A
Part winding compressor relay (OPTIONAL)
Liquid line solenoid
Compressor relay for COMP B
Compressor relay for COMP C
Hot gas bypass (OPTIONAL)
Common Hot gas bypass (OPTIONAL)