Troubleshooting guide

MAGNUM VERSION 8 MANUAL REVISION 3.1
139
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)
12.12. Trane Scroll with 4 Compressor Sets (Trane Quad)
Staging sequence
COMP A COMP B COMP C COMP D
Stage 1
ON OFF OFF OFF
Stage 2
OFF OFF ON ON
Stage 3
OFF ON ON ON
Stage 4
ON 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
Compressor relay for COMP D
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)