Bosch SHP65TL5UC Repair Instructions page 69

Error
Description
Code
E:27 Under-voltage
E:29 Under / overvoltage
E:30 Over-voltage
House wiring isn't 120V
Open "On/Off" "Start" switch
OR
Detergent dispenser
jammed loose
OR
connections
No rinse-aid loose wiring
OR
connections
No rinse aid
Rinse aid setting = 0
702_58300000170749_ara_en_c
Part DW Symptoms
Low supply voltage
Low or high supply voltage
High supply voltage
No power to dishwasher
door Dispenser not operating
wiring
Rinse-aid LED is glowing
No drying OR customers report display cycle times
have increased quite a bit
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(seen during wash cycles)
Check house wiring connections and if supply voltage is ≈
98 - 120VAC to power module harness connector.
Check "On/Off" switch & power module connections.
Measure "On/Off" switch resistance. If it's '∞' Ω in "on"
position, replace it.
If no LED's flash when "On/Off" switch is pressed and the
dishwasher door is open, replace operating module (in
fascia panel).
Make sure dispenser detergent door isn't jammed.
Check connections between rinse-aid dispenser, dispenser
actuator (q3) and power module.
Check dispenser actuator operation. If actuator operates,
but doesn't open detergent dispenser cover, replace
dispenser. If actuator doesn't operate, replace power
module.
Refill rinse aid, if empty.
Check connections between rinse-aid sensor (b3) and
operating module.
Measure voltage between outer most dispenser terminals.
If ≈ 13VDC, replace dispenser. If not, replace operating
module.
Educate customer on using and refilling rinse aid.
Set rinse aid setting to "4" if it is at "0".
Solution
Page 69 of 82