DISHWASHER Service Information Service Information DMT300 DMT400 DMT800 DMR78 DMR 77, DMR 57
• Extra Large Capacity • Elegant Design with Digital Touch Sensors • Increased Convenience d i • Super Quiet Operation • No Filter Cleaning Required
Washability Issues Which Detergent Ingredients Give Best Dishwasher Performance Detergent with a separate rinse additive in the dispenser gives better drying performance. For tough baked on soils an Enzyme detergent is better at hydration of the food soils. g y g y For staining such as tomato, coffee and tea, a detergent with a higher phosphate content (if available) and Chlorine bleach will work on the stains much better than an Enzyme based detergent.
•
Water – Too Soft (“oversudsing”) can leave deposits on clean dishes. – Too Hard can cause spotting/staining and poor wash ability
•
Dishes – Too Dirty (garbage disposal), Too Clean (oversudsing)
•
Detergent – Chlorine, Enzyme, All‐in‐one & Tablets (oversudsing)
•
Rinse Additive Rinse Additive – Liquid in dispenser, All‐in‐one
Fuse • U Units with a fuse, if it blows there is i ih f if i bl h i very low A/C voltage at l A/C l PCB L1 to N, L1 to Ground will read 120vac. Replace fuse and unit may work properly, usually a "weak fuse". • Neutral is fused, use caution as L1 is hot, you will be “ h k d” b “shocked” between L1 and Chassis. d h • Later production the fuse is Later production the fuse is "hidden" hidden in the wire harness. in the wire harness Newer production (May 2009 Serial Newer production (May 2009 Serial *S5*) S5 ) has no fuse. Dead has no fuse. Dead unit, look for cause, if none, replace main PCB (new part #)
Accessing the Fuse Pull D/W, remove right side panel.
Early Production ‐Fuse easily visible.
Not advised to access fuse.
Later Production – Fuse not easily visible 4 under wire harness.
DMT800, 700, 400 Main PCB
Rear Leg Adjustment Rear Leg Adjustment Single Leg in rear
Water Flow Path Adjustable
Split wash arm will cause p leak at front and/or poor wash ability
DMT800
Disassembly
DMT models
Storm wash Nozzle (DMT800)
DMT800 Heater
Drain Pump
Circulation Motor 2 Speed Motor
Thermistor
Heater‐Sump Ass’y, Ass y, 30 min faster 30 min faster heating
Dishwasher “LE” Code
Pump ass’y not properly twist locked
Pins to detect water by Pi t d t t t b change in resistance LE code, CLEAN area after Fault code
Condensation may form, from an un‐insulated outside wall or hole in floor to basement
Hose Cut
Flow Meter Normal water fill, very little water used ~ .9 to 1.1 gal Flow meter must count the water flow for Flow meter must count the water flow for this unit to operate. Water level switch is activated by water from the inlet only. You can’t just pour water into the unit to test it. Flow Meter DMR & DMT300
Detergent/Rinse Aid Dispenser 1. 2.
3. 4.
Detergent Door Not Opening Detergent Door Not Opening Never overfill the dispenser compartment with powder or liquid, only go below or up to fill line. If there is residue around the dispenser door area. Previously un‐dispensed, partially dispensed, or door stuck close issue) clean it with mild soap & water. The residue can jam the mating latch. If the customer uses a self contained type of soap tabs, make sure it is fully seated and the door does not ‘sandwich’ the door does not sandwich it shut. it shut. Make sure that in the rack nearest to the dispenser door when the door is shut, is not obstructing the opening of the dispenser with some protruding utensil.
Soap Dispenser Does Not Open Soap Dispenser Does Not Open Properly and/or Soap is Running Down The Door at the end of the cycle. Two complaints that indicate improper loading of the lower rack.
Detergent/Rinse Aid Dispenser Testing 1. Disconnect wires from the dispenser & close the detergent door. 2. Connect Fused cheater cord and apply 120vac A 3. In approximately 40 seconds the wax motor will open the door. 4 Remove power allow wax motor to return 4. Remove power, allow wax motor to return. 5. Restore power to wax motor, in approximately 40 seconds the rinse aid will be activated. B 6. Remove power. 7. Close detergent door to repeat test
A
B
Fan Vent Assembly DMR units Fan operates only the last 2 minutes of the dry cycle. It moves a low volume of air out of the top of the tub to the tub pan below the door pan below the door
1. 2. 3 3. . 4.
Drying Concerns y g Rinse Agent usage is highly recommended Should use Sanitize Cycle Sho ld open door bet een 30 Should open door between 30 minutes and 3 hours after completion of cycle. All in One products do not dry as well: Rinse Agent is necessary
Air vent dry system DMT300
This system circulates air inside the wash tub with outside air using a plenum This system circulates air inside the wash tub with outside air using a plenum inside the door assembly.
DMT800 & 400
Condensing dry system Ass’y Case Vent Ass’y Dry Duct
Warm Warm (not hot) air vented at (not hot) air vented at bottom of door. D/W Ai I D/W Air In
Ass’y Duct Condenser Vent Air Out Vent Air Out Room Air In
Room Air In Room Air In
DMT800 Dry Vent Wax Motor When fan is powered, wax motor opens vent Thermal Actuator = Wax Motor
Thermal Actuator opens vent seal
Cycle Time Chart DMR only Pre-wash Pre-wash Pre-wash 1 2 3
Main wash
Rinse 1
Rinse 2
Rinse 3
Dry
Total Time
-
32:30:00
7:30
(7:30)
32:30:00
20
110~134
17:30
17:30
46:30:00
7:30
7:30
46:30:00
20
181
16:30
-
-
37:30:00
7:30
-
32:30:00
20
115
0:45
-
-
-
-
9:30
-
-
-
11
Quick
0:45
5:30
-
-
11:30
7:30
-
12:30
-
38
Smart Auto
0:45
5:30 ~17:30
(17:30)
(17:30)
11:30 ~46:30
7:30
(7:30)
12:30 ~46:30
20
58~181
Program
Drain
Normal
0:45
16:30
(16:30)
Heavy
0:45
17:30
Delicate
0:45
Rinse
Program
Rinse 3
Main wash
Pre-wash 1,2,3
Rinse 1,2
No Sanitize
Sanitize
Normal
-
-
-
-
120˚F
-
-
140˚F
162˚F
H Heavy
-
-
-
-
149˚F
-
-
158˚F
162˚F
Delicate
-
-
-
-
113˚F
-
-
140˚F
162˚F
Rinse
-
-
-
-
-
-
-
-
-
Q Quick
-
-
-
-
113 ˚F
-
-
162˚F
Smart Auto
-
-
-
-
113~149˚F
-
-
140˚F 140~158˚ F
162˚F
DMT800 Cycle
Pre- Prewash wash 1 2
Normal
Rinse 1
Rinse 2
Rinse 3
Last Rinse [Sanitize]
Dry (min.)
Water [gal(ℓ)]
Time (min.)
30
3.6~6.7 (13.6~ 25.2)
110~132
Flex
●
x
136 ˚F [162 ˚F]
140 ˚F
●
●
●
158 ˚F [162 ˚F]
40
8.1 (30.6)
152
x
122 ˚F
●
●
x
140 ˚F
30
4.7 ((17.7))
107
●
131˚F
149 ˚F
●
●
●
158 ˚F [162 ˚F ]
40
8.1 (30.6)
157
●
x
140 ˚F
x
●
x
140 ˚F [162 ˚F]
15 (+15)
4.7 (17.7)
59
x
136 ˚F [162 ˚F]
4.7~6.7 (17 7~ (17.7~ 25.2 )
100~149
●
Flex
Heavy
●
●
Delicate
●
Pot & Pans Quick + Smart Auto
Main wash
Up to 30 min quicker
●
Flex
120 ~ 138 ˚F
122 ~138 ˚F
Flex
●
30
Error Codes & Test Modes Error Codes & Test Modes • This information varies by model This information varies by model • Use Fast Track Troubleshooting for each model
Error Error Type Mode
Water Supply Error
Water Supply Error . . Temp Sensor Error
Drain Error
Error Codes Cause
Reason
Tests Without Pulling D/W 1. When the pulse of 100 or less is Water supply valve defect, Flow Check valve resistance detected 1 minute after the water Meter defect, Particles within and voltage at brown wire supply starts water supply valve, Water supply at CN14 to yellow wire at 2 When flow meter pulse is 5 or valve terminal not connected, 2. connected detergent dispenser 1.2 12K 4E less 5 seconds after the water Main PBA defect ohms @ 120vac supply starts 3. No water detected 5 min after start When 80 or above is detected Thermistor Defect, Water supply Perform service test t3, during water supply temperature of 80 or above, for 3 minutes and 4E1 . Main PBA defect compare display temp . . . with actual water temp . When 0.2V or below, or 4.5V or Thermistor terminal not Celsius. It should be . above is maintained for over 3 connected within about 8 degrees C. tE1 seconds Thermistor Defect, Main PBA Difference due to tank vs. defect sump temperature. When OFF status of Low Level Drain pump defect, Low Level Perform service test t6 S/W is not detected within3 Sensor defect, Particles clogging Check motor resistance minutes during the drain mater drain hose, Drain valve and voltage at white on 5E terminal not connected CN1 to orange wires at Main PBA defect CN14 42.2 42 2 ohms @ 120vac
Fault CODES
DESCRIPTION
SUSPECT
Technical Description
Temperature Sensor error
Thermister Main PCB
Thermister terminal not connected Possible defect : Thermistor , Main PBA
HE
Open Heater Heater Relay Main PCB
Heater terminal not connected Possible defect : Main WireHarness, open Heater or Heater Relay, Main PBA
High temperature Heating error. HE1
Heater relay Main PCB Thermister
Water temperature sensed above 176F during operation Possible defect : Thermistor , Main PBA or shorted heater relay
Low-level water error
Low level Sensor
Level sensor fails to close after 1.2 gallons of water is metered in. If water is present check for level sensor float stuck in empty position or bad switch
Flow Meter Water Valve No Water Supply
Main PCB does recognize proper or no water flow through flow meter. Check supply and water valve
Incoming Water Temp sensed above 176F
Faulty Thermister or Main PCB / Incoming water is over 176F
Level sensor fails to open after 3 minutes of drain
Evaluate Drain Operation / Possible kinked drain hose / obstruction in pump or sump assembly. If water has drained check for level sensor stuck in closed position.
Water reaches top p of level sensor container
Suspect stuck water valve / Faulty flow meter or possible drain issue.
LE
Water Present in Base of D/W
Inspect for leaks / if no leaks present unplug sensor if code goes away replace leak sensor if not check harness for short or pinched wire before replacing Main PCB
Button error
Stuck Button
When a button is pressed continuously for 30 seconds seconds. Check panel alignment / Main or Sub PCB failure
Door is open in wash or at start
Door is not close properly. Possible defect : Door lock switch, Main PBA
TE1 Heater error
9E
Water supply error
4E High temperature Water supply pp y error
4E1 Drain error
5E Over-level Over level Error
OE Leakage error
6E2 Door open warning
Code symbol
HE
1E
Meaning
Occurring condition
Expected condition
Temp sensor Error
When 0.2V or below, or 4.5V or above is maintained for over 3 seconds
Thermistor terminal is not connected Possible defect : Thermistor , Main PBA
Heater Error
When the temperature change is 4 or less within the Heater terminal is not connected first 10 minutes after the heating starts Possible defect : Main Wire-Harness, Heater, Main PBA High temp When the temp of the Thermistor is 80 or above for Water temp is 80 or above Heating error. more than 3 seconds during operation. Possible defect : Thermistor , Main PBA
9E
Low-level water error
1.When high level sensor is not detected after water supply was done, drain & refill the water. After then, if high level sensor is not detected again, this error is occurred. 2.When low level sensor is detected over 5 seconds during wash operation, this error is occurred.
Water Level Sensor terminal is not connected Possible defect : Ass’y case sensor, Water Level Sensor , Main PBA
PE
Half load function error
When micro s/w is not detected for over 30 seconds after the Distributor motor starts
4E
Water supply error
3E
High Hi h ttemp Water supply error Drain error
1. When the pulse of 100 or less is detected even 73 seconds after the water supply 2. When flow meter pulse is 5 or less for 13 seconds after the water supply starts 3. When the water supply is not finished until 6 minutes after the water supply starts Wh 80 or above When b is i detected d t t d during d i water t supply l
Distributor motor defect Micro SW terminal is not connected Main PBA defect Alien p particles within water supply pp y valve Water supply valve terminal not connected Possible defect : Main PBA, Water supply valve , Flow Meter
5E
oE
Over-level water error
When OFF status of Low Level S/W is not detected within 3 minutes during the drain. When overflow detection AD data is 3.5V or below for 3 seconds (When leakage sensor detects 3.5V or below for 1 seconds during water supply)
Water W t supply l temperature t t is i 80 or above b Possible defect : Thermistor, Main PBA Alien particles are clogging in drain hose Drain pump terminal is not connected Possible defect : Drain pump, Water Level Sensor , Main PBA Alien particles within water supply valve Case Sensor part breakdown Possible defect : Flow Meter, Main PBA, Water supply valve
Service Test Modes & Codes
DMT
To access Service Test Mode Door Must Be Closed • Press P th the Heavy H + Delicate D li t + Power P b tt buttons att the th same time ti for f two t seconds d to t enter Service Test Mode. • All LEDs are displayed for the first two seconds and then Software version will be indicated in Binaryy Code usingg LEDS ….Wash / Dry y / Clean/Child Lock • Just like the DMR series you advance through the test next mode by pressing the Normal button . However each test will run by itself (see sequence chart on next page) when test has completed an led will light to indicate test is done and you can then advance to the next test . •Code list and descriptions located on pp#3. Note: Like the DMR series the codes are displayed during operation or test modes and are not stored in memory.
Test Modes DMR series
Service Press the Delay Start “ALL” is You can change the mode I Inspection i + Normal N l + Power P displayed di l d by b pressing i the h Normal N l key. k Mode keys at the same time for the first Each time the Normal key is three (3) pressed, the mode changes seconds in the order of t1 → t2 → t3 and d then th → t4 → t5 → t6 → t7 → t8 t8. “t1” Mode Related parts Symptoms Activate Mode Live Test Notes t1
Inlet valve, valve Flow Meter, Low Level Sensor Water not needed in unit for 45 second drain pump for 45 second drain pump test
t2
Circulation Motor
4E error 9E error
If you press the Delay Start Water fill in key, water is drained for 45 approximately 70 seconds and then the water seconds average supply starts. water pressure, If the pulse count is more than fills to about 1 inch 660, change the mode. past heater shield Make sure to change the (very little water mode when the pulse count is showing in unit) more than 660 in t1 mode mode. Nozzle does 1. Press the Delay Start key Place some cups not spray to start or stop the pump. on racks and run 2. If a low water level is circulation pump to detected water is supplied detected, verify water again and the operation distribution in tub. continues.
DMR57, 77 & 78 Part Update
