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P119 User Guide HWD-2102 REVISED MARCH 2020
7
Error Messages
The UNLOCK/DISPENSE pad rapidly flashes red if finger remains on it after dispensing and no
water is dispensed.
If finger remains on the UNLOCK/DISPENSE pad more than 35 seconds while rapidly flashing
red-the controls “lock out” and READY LIGHT & HEATING LIGHT will flash rapidly to show a
fault state. See keyboard errors 1 & 2 in chart below
All controls are disabled during fault state.
To clear Fault State:
Switch machine “OFF” for about ten seconds, and then toggle back “ON” (Control Reset)
After controls initiate, hot water tank level and temperature are checked- then the “READY” light will activate
.
This will take approximately 2 minutes for filled and heated unit; up to 20-30 minutes for a new/empty unit
Color of LED-See above
Error Messages
“READY”
“HEATER”
“TOUCH
PAD”
Error type
Green
White
Red
BLINK
BLINK BLINK
System error
BLINK
Off
Off
Thermistor short
Shorting out the thermistor will cause the thermistor error at once
BLINK
Off
ON
Thermistor open
Opening the thermistor will cause the thermistor error at once
BLINK
ON
Off
Initial fill error
Tank has not filled in 6 minutes
BLINK
ON
ON
Fill error
Tank does not re-fill after 1 minute
BLINK
BLINK
Off
Boil error
If the heater is on
and Tank temperature is not increasing according to
software logic and the tank temperature
>
92C
BOIL ERROR-This means that the water in the tank is boiling, flat temperature—no increase to set point.
This fault usually occurs at higher elevations where boiling point is reduced from lower barometric pressure compared to sea level.
Recommended action: review boiling point correction for altitude table (page-6) with suggested setting for the operator at higher elevations.
BLINK
BLINK
ON
Heater open
If the heater is on
and Tank temperature is not increasing according to
software logic and the tank temperature
<
92C
HEATER OPEN- This means that the power board or that the heater control triac is sending power to the heater, but the heating element is
faulty or damaged-(OPEN-circuit).
Fault is with the damaged heating element or bad connection or control circuit problems
Recommended action. Check all wiring, internal and external connections –if good: service as follows: In order of repair
1: Test & replace heater 2: Replace triac 3: Replace control board
BLINK
Off
BLINK
Heater shorted
TRIAC Failure
If the heater is supposed
to be off
and
The heater is off during (7 min) temperature rise
time
and
the tank temperature
is greater than
the software logic calculates
HEATER SHORTED-The triac is stuck closed, (MAKE position in Make/Break contactor code). Power is always getting to the heater
meaning it is out of the control system. Traic and solid state relays fail CLOSED, in the Make Position. This fault usually occurs from a stuck
(faulty) triac. The heating element is powered thru damaged triac (no signal to triac but it is conducting power to the heater)
Recommended action. Replace triac—Check all wiring, internal and external connections.
BLINK
ON
BLINK
Keyboard error 1
1. Press and hold the button with unit idle.
After 3 seconds unit goes into proportional mode
As soon as unit begins to dispense a 45 second timer is started
unit will stop dispensing after the programmed timed
keyboard error is caused if the button remains held for more than 45 seconds
Keyboard error 2
2. Press and release then press to have a manual dispense
if the button remains held for more than 30 seconds-->the dispense will stop.
45 Seconds after the dispense stops the unit goes into keyboard error
PUSH
Ready [Green]
Heater [White]
Touch
Pad
[Red]
Power [White]
