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21 312028000
NO. 1 AND NO. 2 EVAPORATOR COILS
REFRIGERATION COMMON OUTLET TEMPERATURES
NO. 2 EVAPORATOR REFRIGERATION
COIL INLET TEMPERATURE
NO. 1 EVAPORATOR REFRIGERATION
COIL INLET TEMPERATURE
MOTOR CURRENT
ADJUSTMENT
DIP SWITCH
ASS’Y
POINT OF SALE MESSAGE DISPLAY SELECT
(See Table 7)
BEATER MOTORS CURRENT READOUT (See Table 5)
MOTOR CURRENT SELF-CALIBRATION (See Table 5)
NOT USED
APPLICABLE ELECTRIC OR GAS DEFROST (See Table 5)
SERVICE USE ONLY
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RELAY CIRCUIT
BOARD NO. 1
RELAY CIRCUIT
BOARD NO. 2
MASTER CIRCUIT
BOARD
10
9
8
7
6
5
4
3
2
1
FIGURE 4. MASTER AND RELAY CIRCUIT BOARD
Note: Switch No. 3 must be in “OFF” position for standard Units with pulse expan-
sion valves. Switch No. 3 must be in “ON” position for Units with mechanical
expansion valves.