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Maintenance And Service - Bosch Greentherm T9900 SE 160 Installation And Operating Instructions Manual

Indoor residential tankless water heaters, 160 000/199 000 btu- natural gas 160 000/199 000 btu - liquefied petroleum lp gas
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Maintenance and service

▶ Touch the symbol
A green check mark is displayed indicating that reset is
complete.
6.9.3 Problem solving to activate Wi-Fi
Exceed Wi-Fi activation time
The Wi-Fi module must be activated within 15 minutes after
plug in the appliance to the power supply.
▶ Unplug the appliance from the power supply.
▶ Repeat Wi-Fi activation process, see section 6.9.1 "Wi-Fi
activation".
Wi-Fi module disconnected from HMI
If an error message is displayed or isn't possible to configure
Wi-Fi menus:
▶ Unplug the appliance from the power supply.
▶ Remove the front cover, see fig. 3, page 12.
▶ Confirm that Wi-Fi module is correctly installed in the HMI.
Wi-Fi module is located on the back side of HMI.
Fig. 52
Wi-Fi module installed in HMI
[1] Wi-Fi module
56
.
7
Maintenance and service
DANGER:
▶ Always shut off the electrical power supply, shut off the
manual gas valve and shut off the water valves whenever
servicing.
DANGER:
▶ Replace all dismantled seals and o-rings with new ones.
NOTICE:
▶ Inspect the complete water heating system once a year.
▶ Follow points 5 and 6 in Table 23 after 400 operation
hours or 25000 cycles (whichever occurs first), see
chapter 6.5.1(Data History).
▶ Inspect the water heater and components for wear or
fatigue. Immediately repair all faults to avoid damage to the
system.
Annual maintenance table
1. Inspect venting system
2. Inspect heat exchanger
3. Inspect burner
4. Inspect pressure relief
5. Inspect water filter
6. Heat Exchanger
Descaling
7. Inspect condensate trap
1) Proceed with burner cleaning if error code CE, CF and C2 is
displayed. Check the flue exhaust for blockage (appliance
is protected against flue blockage).
2) Proceed with heat exchanger descaling whenever error
codes AA and E5 are displayed (appliance is protected
against over heating in case of scaling), see table 17 Water
Quality.
Table 23 Annual maintenance
Greentherm T9900 SE/i – 6 720 813 635 (2019/03)
Every year
X
X
1)
X
X
X
2)
X
X

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