Quincy QMB Series, Instruction Manual

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SYSTEM INDICATORS: 

RUN STATUS

 indicates that the compressor is in a run state.  A steady light indicates that the 

compressor is running.  If this light is 

flashing

, and the compressor is in a stopped condition, the 

compressor will 

re-start at any time

.  This also indicates that the compressor is about to start, when the 

auto-restart option is enabled. 
 

LOAD/UNLOAD:

 The left-most digit on the numeric display will show 'L' when the compressor is 

loaded, and 'U' when unloaded. 
 

PROGRAM SETUP MENUS 

 
The program setup menus are accessed by holding both the UP and DOWN keys in, until the LED lamps 
on the left start to flash.  Release the UP and DOWN keys, and when the numeric display shows  -00- 
flashing, use the up key to select the desired menu (1, 2, and 3 are user menus). 
There is a time limit to select the menu number.  If this time period is exceeded, the control will return to 
the standard display mode. 
 

NOTE:

The nomenclature on the decal beside the LED's does NOT represent the function of the LED in 

these menus. 

MENU 01: BASIC OPERATING ADJUSTMENTS. 

LED 1:

 Use the MENU key to select the UNLOAD pressure, as indicated by a 'U' at the left-most digit.  

Use the UP or DOWN keys to adjust.  

NOTE: Value is saved when display is no longer blinking. 

 
Use the MENU key to then select the LOAD pressure, as indicated by an 'L' at the left-most digit, Use the 
UP or DOWN keys to adjust. 
 

LED 2:

 This allows the adjustment of the Wye/Delta (Y/D) time on the contactor: this is set to optimum 

at the factory.  This should be set to allow the motor to reach full speed before the contactors switch from 
wye to delta connection. 
 

LED 3:

 This is the AUTO-DUAL timer setting.  This is how long the compressor will run in an unloaded 

state before shutting down (Minutes).  When the delivery pressure falls  below the LOAD setting after 
shutting down, the compressor will start up automatically.  A 'd' will show in the left-most digit of the 
display to indicate this is the Auto-Dual timer. 
 

LED 4:

 This is the auto-restart delay in Seconds.  The compressor will  delay this length of time on 

power-up, before automatically starting.  An 'r' will show at the left-most digit.  Set to 0 if auto restart is 
NOT required.  

NOTE:

AUTO-RESTART refers to the automatic starting of the compressor on power 

application.