Grindmaster HC-2 Troubleshooting Guide, Problem/Possible Cause, Service Check, Remedy, Page

Troubleshooting Guide

The following procedures must be performed by a qualified service technician.

Problem/Possible Cause	Service Check	Remedy
Consistent filling of water tank
• Leaking fill solenoid valve	• Removing power to machine does not	• Clean-replace fill valve
	stop tank fill
• Electrode lined up or faulty	• Jumper from C to high on probe side of	• Clean electrode rods. Check
	board shuts fill off	rods & wiring; replace if
		necessary
• Faulty white common	• Jumper from COM on probe side of	• Tighten, clean, replace COM
connection to ground	board to ground stops fill	connection to ground
• Liquid level control faulty	• Jumper from High to COM on probe	• Replace liquid level control
	side of liquid level does not shut fill Off
Water not heating up
• Thermostat Off	• Visual	• Turn thermostat sleeve clockwise
• Thermostat faulty	• Thermostat contacts do not close with	• Replace thermostat
	sleeve clockwise and inner screw
	counter clockwise
• Power relay faulty	• No voltage to heating element - 120V.	• Replace power relay
	across coil of relay does not pull in
• Heating element faulty	• 120V across heating element but no	• Replace heating element
	heat-element reads open with ohmeter
Nothing dispensed - water or
chocolate - No whipper action
• Dispense switch faulty	• Switch reads open with ohmeter when	• Replace switch
	switch is pushed
No water dispensed or whipper
action - Only chocolate is dispensed
• Water switch faulty	• Switch reads open with ohmeter when	• Replace switch
	switch is in On position
No water dispensed - Whipper
works and chocolate is dispensed
• Tank refill problem	• Check auto refill system	• Clean-replace components
• Kinked silicone tubing	• Check tubing run to mixer assembly	• Reroute tubing-unkink
• Dispense valve faulty	• 120V across input terminals on valve-	• Replace coil or entire valve
	no actuation
No whipper action - only water
and chocolate are dispensed
• Whipper motor faulty	• 120V across motor leads but motor	• Replace whipper motor
	does not run
No chocolate dispensed - Whipper
works and some water is
dispensed
• No syrup to pump	• Check syrup container	• Replenish syrup supply
• Kinked pump tubing	• Check tubing runs	• Unkink, reroute, replace
• Syrup pump faulty	• 120V across pump motor leads, pump	• Replace syrup pump-Unjam
	does not run; check for jammed rollers	rollers
Constant dispense - chocolate,
water and whipper action
• Dispense switch faulty	• Switch reads closed with ohmeter with	• Replace switch
	switch in the Off position
Constant water dispense or drip	• Dispense or drip continues with	• Clean, rebuild; replace
• Dispense valve faulty	power Off	dispense valve

Crathco® Whipped Hot Chocolate Dispensers Page 6