©McDonald’s Corporation · Planned Maintenance Manual · Revised December 2008
Page 1 of 3
7018014_00 10/2011
Check water quality
Annual
PR 28 A5 T
Why
Preventing appliance failures
Time required
3 minutes to prepare
10 minutes to complete
Time of day
Low-usage period
For 24-hour restaurants: Low-usage period
Hazards
Operating certain actuators will start the fan or the heater, which may
cause severe injury to the hands or entangle hair/clothing or cause burns. Make sure that you
operate the correct actuator.
The analysis liquid for general hardness can cause eye and skin irritations. Do not let the
analysis liquid come in contact with skin or eyes and wear personal protective equipment (PPE).
Hot surfaces can cause burns. Wait until the cooking chamber has cooled down and wear
personal protective equipment (PPE).
Tools and supplies
Personal protection
equipment: Heat
protective gloves
2 sample containers
for taking water
samples (1 for soft
water, 1 for cold
water)
1 TDS meter
Order no: 3019007
(or similar if sourced
locally)
1 water analysis kit
Order no: 3019010
(or similar if sourced
locally)
Screwdriver to
unlock suction panel
Procedure
QUALIFIED TECHNICIANS ONLY
1
Remove suction panel
Sampling soft water:
Use screwdriver to unlock suction panel. Push suction
panel upwards and remove it.
WARNING!
Parts of oven may be hot.
3
Start water injection
Press and hold the actuator (1) for several seconds.
Result:
Water must be injected into the cooking chamber.
2
Enter “Diagnostic mode”
Open the 'Service agent mode' page and then the
'Service' page. Select the 'Visual' tab. Select 'Diagnostic
mode'.
At the prompt, enter and confirm the password.
Operating certain actuators will start the fan or the
heater. Make sure that you operate the correct actuator.
DANGER!
CONVOTHERM
,
C
ombination
oven,
OES 6.10
QUALIF
IED
TECH
NICIANS
ONLY
A
NNU
AL
PR
28
A5
T