Grindmaster AT-2W Benutzerhandbuch

No Hot Water

1. Tank heater

2. Hi-limit thermostat 

or main thermostat

1. Check the voltage at the tank 

heater terminals. Voltage should be 

120V (230V for E models). Check 
serial tag for proper voltage.

2. Check the voltage between the 

white wire on the tank heater 
terminal and the incoming terminal 
(black wire) on the hi-limit 
thermostat, then the outgoing 
(black wire) terminal on the hi-limit 
thermostat.

1. (A) If correct voltage is present at the tank heater 

terminals and water is not being heated, replace tank 
heater.
(B) If voltage is not present at tank heater terminals, 
refer to step 2.
(C) If incorrect voltage is present at tank heater 
terminals, check voltage at outlet.

2. (A) If voltage is present on incoming terminal on the 

hi-limit thermostat but not on the outgoing terminal, 
replace hi-limit thermostat. 
(B) Check voltage between black and white wire on 
receptacle. If voltage is not present check outlet or 
circuit breaker. 
(C) If voltage is not present on incoming terminal of 
hi-limit thermostat, replace main thermostat.

Steaming or
Spitting Around
Funnel

1. Main thermostat

2. High altitude

1. Thermostat contact stuck or out of

calibration

2. For altitude above 5,000 feet (1,500m)

1. (A) Adjust thermostat to lower temperature setting.

(B) Thermostat should be calibrated or replaced.

Dripping

1. Not siphoning properly

2. Leaky fill valve

1. Water should flow from sprayhead freely

2. Turn off water supply to see if 

dripping stops

1. (A) Clean sprayhead holes

(B) Check tightness of sprayhead tube.
(C) Check brass elbow in tank for debris

2. Replace or repair inlet valve as needed

Dry Coffee
Remaining on
Brew Basket

1. Filters
2.  Not siphoning properly
3. Improper loading of 

brew basket

1. Are correct filters being used
2. Refer to “dripping” step 1
3. Filter and coffee in brew basket 

1. Use correct filter
2. Refer to “dripping” step 1
3. Filter should be centered in brew basket and 

coffee bed should be level.

Warmer Station

1. Warmer - defective

2. Warmer On/Off switch

3. Bad harness

1. Voltage at warmer terminals should 

be 120V (230V for E models).

2. If voltage is not present on warmer 

terminals, check continuity of switch

3. Check connections between harness 

and switch, and between switch and 
warmer.

1. If voltage is present on terminals, but warmer is 

not heating, replace warmer.

2. If switch does not make and break continuity 

when turned on and off, replace switch.

3. All connections should be tight.

Overflowing

1. Receiving container 

not completely empty 
at start of brew cycle.

2.  Not siphoning properly
3. Adjust timer

1. Operating instructions

2.  Refer to “dripping” step 1.
3. Check valve on-time with watch

1. Always start brew cycle with empty container.

2. Refer to “dripping” step 1.
3. Refer to “Brew Volume Adjustment” section

Low Pot Level

1. Adjust timer 

1. Check valve on-time with watch

1. Refer to “Brew Volume Adjustment” section

Excessively Long
Brew Times

1. Lime scale build-up

1. Remove spray head deflector and check 

nozzle.

1. Delime machine.

Little or No Water
From Faucet

1. Lime scale build-up
2. Clogged inlet valve

Be sure water is turned on.

1. Delime heat exchanger.
2. Replace or repair inlet valve.