Grindmaster P-430, RAPS-430, RAPS-330, RAP-330 Troubleshooting Guide cont’d Possible Cause Solution

Problem

AMERICAN METAL WARE® BREWERS

TROUBLESHOOTING GUIDE (cont’d)

Possible Cause Solution

Tank does not refill (cont’d)

Tank does not heat

• Fill valve is faulty.

• Control board is faulty.

HEATING PROBLEMS

•No electrical power to equipment.

•No power to control board.

•High electrode coated with lime or faulty.

•Connection from control board to tank body faulty.

•Connections from control board to heater relay faulty.

•Line voltage connections to heater relay faulty.

•Connection to remainder of heater circuit faulty.

•Heater relay faulty.

• Thermal cut-out tripped or faulty.

•Check to ensure proper connection between connector CN4 and control board. Check for proper connections at fill valve terminals.

Check for proper connections between N terminal of fill valve and terminal block. Drain 1 gal. of water from hot water faucet. Check for 120Vac across fill valve terminals. If connector CN4 is securely attached to control board and all connections are secure and there is 120Vac across fill valve terminals, replace

control board.

•Check to ensure proper connection between connector CN4 and control board. Check for proper connections at fill valve terminals.

Check for proper connections between N terminal of fill valve and terminal block. Drain 1 gal. of water from hot water faucet. Check for 120Vac across fill valve terminals. If connector CN4 is securely attached to control board and all connections are secure and there is 120Vac across fill valve terminals, replace control board.

•Check for proper voltage at terminal block. Check circuit breaker on supply circuit. Establish electrical power to unit.

•Check for 120V across transformer primary terminals by disconnecting the quick-connect for the red and white wires to the transformer and measuring voltage at this point. If there is not 120V across primary, proceed to step entitled “No power to control board and transformer not powered”. If there is 120V across primary, proceed to step entitled, “No power to control board and transformer powered”.

•Disconnect electrode wire at quick connect (red wire). Connect a wire from the quick connect to the cabinet body. If heating begins, this is the error cause. Remove electrode assembly and clean the probes. If problem is not corrected, replace electrode assembly.

•Check to ensure connection (yellow wire) is secure. Make connection to tank secure.

•Check to ensure connections (yellow and orange wires) are secure. Make connections to relay secure.

•Check to ensure connection (red and blue wires) are secure. Make connection to relay secure.

•Check to ensure connections from relay to thermal cut-out and from thermal cut-out to contactor and from contactor to N terminal of terminal block are secure. Make connections secure.

•Ensure that coil on heater relay is energized by ensuring that there is 12Vac between the yellow and orange wires attached to the relay. Remove the blue and red wires from the relay and check for an open circuit across the connection tabs (COM and NC) to which the wires were attached. If the relay coil is energized and there is an open circuit across the connection tabs, replace relay.

•Check for open circuit on thermal cut-out.

(NOTE: Tripping of thermal cut-out can indicate presence of another problem with the unit. Unit should be monitored after resetting thermal cut-out). Press button on thermal cut-out, if open circuit condition continues, replace thermal cut-out.

Page 7