Bosch UniversalRotak 36-550 - Troubleshooting; Resolving Operational Issues; Maintenance and Service; Battery Care and Longevity

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Problem Possible Cause Corrective Action
Motor refuses to start Internal wiring of garden tool defective Contact Bosch customer service agent
Battery discharged Recharge battery
Battery too hot/cold Allow to cool/warm
Grass too long Max. allowed grass height 30cm on highest
height-of-cut setting
Motor protector has activated Allow motor to cool and increase height of cut
Isolator switch not inserted correctly/fully Fit correctly
Garden tool functions
intermittently
Internal wiring of garden tool defective Contact Bosch customer service agent
Motor protector has activated Allow motor to cool and increase height of cut
Machine leaves ragged
finish
and/or
Motor labours
Height of cut too low Increase height of cut
Cutting blade blunt
Replace cutting blade (see figure J)
Possible clogging Switch garden tool off and disengage isolator
switch
Check underneath the garden product and clear
out as necessary (always wear protective gloves)
Blade fitted upside down Refit blade correctly
Blade not rotating
while garden product
switched on
Cutting blade obstructed Switch garden tool off and disengage isolator
switch
Clear obstruction (always wear protective gloves)
Blade nut/bolt loose Tighten blade nut/bolt (27Nm)
Excessive vibrations/
noise
Blade nut/bolt loose Tighten blade nut/bolt (27Nm)
Cutting blade damaged
Replace cutting blade (see figure J)
Battery and charger
Problem Possible Cause Corrective Action
Red battery charge in-
dicator on charger
flashes
No charging procedure
possible
Battery not (properly) inserted Properly insert battery in charger
Battery contacts contaminated Clean the battery contacts (e. g. by inserting and
removing the battery several times) or replace
the battery
Battery defective Replace the battery
Battery charge indic-
ator on charger does
not light up
Mains plug of battery charger not plugged in
(properly)
Insert mains plug (fully) into the socket outlet
Socket outlet, mains cable or battery charger de-
fective
Check the mains voltage; have the battery char-
ger checked by an authorised after-sales service
agent for Bosch power tools
Maintenance and Service
Battery Maintenance
u Warning! Switch off, remove the isolator switch, bat-
tery and grass bag before adjusting or cleaning.
u Always wear gardening gloves when handling or work-
ing near the sharp blades.
Use the following procedures to enable optimum usage of
the battery:
– Protect the battery against moisture and water.
– Store the machine and battery only within a temperature
range between –20°C and 50°C . As an example, do not
leave the battery in the car in summer.
– It is recommended that the battery is not stored within
the product but stored separately.
– Do not leave the battery in the product in direct sunlight.
– The ideal storage condition for the battery is 5°C.
– Occasionally clean the venting slots of the battery using a
soft, clean and dry brush.
A significantly reduced working period after charging indic-
ates that the battery is used and must be replaced.
Bosch Power Tools 1 609 92A 5WA | (16.07.2020)