Philips 4000 Service Manual page 5

PHILIPS 4000 and 3000
Simply turning off the main machine power switch is not an adequate safety
precaution.
This domestic appliance is rated as insulation class I.
On completion of the repair work, insulation and dielectric rigidity tests must be
performed.
Disassembling the machine, the operator must pay attention to hot and under
Pressure parts: boiler, pin-boiler, valves, dispensing, steam tube, brew unit,
connections and pipes to avoid burns. Please refer to specific hydraulic circuit
(Image1) to know the parts in detail.
The machine hydraulic circuit can reach maximum pressure of 16/18 bar.
To operate in safety condition is recommended to perform the Steam Out procedure in
order to remove the pressure and hot water inside the hydraulic circuit.
When the machine arrives at the Service Center in descaling mode interrupted, or making Descal-
ing , be very careful not to come into contact with the Descaler.
After the product has been repaired, it should function properly and has to meet the safety re-
quirements and legal regulations as officially laid down at this moment
Water
Hot water /steam
From this point circuit
in pressure
From this point circuit
High temperaure
Water tank Water tank
Flowmeter
Flowmeter
Pump
Pump
Brewing Unit
Safety valve
Safety valve
Image 1
Steam and hot water
Steam pipe
Brewing Unit
Water
Water
discharge
discharge
01 INTRODUCTION
Two-way solenoid valve
Two-way solenoid valve
Boiler
Boiler
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