Hoshizaki FD-650MAH-C Service Manual page 22

• X1 Relay
115VAC input (BR)
Comp (BR)
• K1 Connector
(115VAC)
#3 GM/FM/FMR (R)
#2 Input (BR)
•
K2 Connector
(24VAC)
Drain Valve
#10 (W/BU)
Control
Transformer Input
#9 (W/R)
Inlet Water Valve
#8 (O)
Control
Transformer
Input
#7 (W/R)
• J2 Connector-Open
High-Pressure Switch
#3 to #4 (Y)
Open-5VDC
Closed-0VDC
Control Switch
#1 to #2 (W/BK)
"ICE"-Open-5VDC
"DRAIN"-Closed-0VDC
5VDC Ground (GND) Terminals
Compressor Delay Relay Circuit
#5 to #6 (W/O)
Relay De-Energized-Open-5VDC
Relay Energized-Closed-0VDC
5VDC
Closed
(yellow LED off)
20VDC DBU to BR
20VDC DBU to W
0VDC W to BR
Fig. 4
22
•
K9 Connector
•
"SERVICE" Button
(Ice Purge Cycle Bypass)
•
K8 Connector
(24VAC and 5VDC)
Control Transformer
24VAC Input
#1 (W/R)
Control Transformer
24VAC Neutral
#2 (LBU)
Bin Control
(Mechanical or Jumper)
#3 to #4 (GY)
Open-5VDC
Closed-0VDC
Float Switch
#5 (BK)
Upper Float Switch
#6 (R)
Open-5VDC to #5 (BK)
Closed-0VDC to #5 (BK)
Lower Float Switch
#7 (DBU)
Open-5VDC to #5 (BK)
Closed-0VDC to #5 (BK)
•
K7 Connector-open
•
"POWER OK" LED
•
S1 Dip Switch
• K6 Connector (20VDC)
Bin Control (Infrared Sensor)
(dark blue (DBU))
(white (W) signal (common))
(brown (BR)(ground))
Open
(yellow LED flashing
or steady)
20VDC DBU to BR
0VDC DBU to W
20VDC W to BR