11
ERROR CODES
Curtis ADS Digital Systems contain various safety features in the electronic circuitry that will shut down the
functions of the unit in the event of system failures. Error codes are signalled by the red READY-TO-BREW
light blinking.
INTERPRETING THE CODES
Error Codes can only be reset by turning the rear toggle switch to Standby for a minimum of 10 seconds, then returning
the switch to ON. Any service required for your Curtis system must be performed by a qualified service technician.
SYMPTOM: WATER DOES NOT FLOW INTO HEATING TANK
POSSIBLE CAUSE SOLUTION
1. Water line has been turned OFF Turn ON Water Line; confirm unit is turned on
and water is flowing into heating tank.
2. Insufficient Water Supply; Straighten Water Line; confirm unit is turned on
Water Line Pinched and water is flowing into heating tank.
3. Clogged Water Filter Replace filter; confirm unit is turned on and water
is flowing into heating tank.
4. Defective Inlet Valve Contact Factory.
5. Grounded Probe Contact Factory.
6. Defective Control Board Contact Factory.
SYMPTOM: WATER HEATING TANK OVERFLOWING
POSSIBLE CAUSE SOLUTION
7. Defective Water Inlet Valve. Turn power off and observe tank water level.
If water continues to flow Inlet Valve must be
cleaned, rebuilt or replaced.
8. Limed-Up Probe Clean and/or replace.
9. Non-grounded or loose The control board must be securely grounded for
terminal connections at proper operation. Check for loose connections at the
control board or tank. terminals.
10. Defective Control Board Contact Factory
SYMPTOM: WATER IN HEATING TANK DOES NOT GET HOT;
WATER TEMPERATURE TOO LOW.
POSSIBLE CAUSE SOLUTION
11. Defective or Loose Heat Sensor Make sure there is a layer of silicone paste (Part No.
WC-5229) between the sensor and tank body. The
fastening nut should be securely tightened, making a
good connection. Check wire for damage.
12. Defective Heating Element Contact Factory.
13. Defective Control Board Contact Factory.
Water Level
ERROR CODE
TROUBLE-
SHOOTING
GUIDE
Temp Sensor
ERROR CODE
Water Level
ERROR CODE
IMPORTANT: Error
Codes are indicated
by the red Ready-to-
Brew light. If an
Error Code occurs
the unit will shut
down all functions
including heating,
water inlet, water
delivery. ALWAYS
confirm Error Code
THREE times.
IMPORTANT: Heating
function may be
SHUT DOWN due to
Water Level Error
Code.
ADS technology features a state-of-the-art Error Code System. This is designed to quickly advise you of any
problems the system may experience expediting service or repair. Occasionally an error reported may be a problem
with the water supply or electrical power, NOT directly associated with a fault of the Curtis System itself. An example
of this includes:
• Clogged Water Filter – Indicated by a Water Level Error Code
Error Codes are indicated by blinking a pattern as follows:
= Long Flash = Short Flash
= WATER LEVEL PROBLEM
= TEMPERATURE SENSOR PROBLEM
READY TO BREW
Client: Wilbur Curtis Co.
Job: 8340
Page 8
ERROR CODES
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