Hitachi RAW-35RHC, Руководство по обслуживанию

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5 Servicing
Indoor unit
SMGB0135 rev.0 - 06/2020 55
5
5.2.5 Replacement of the thermistor
1 Remove the screws (x4) of the heater cover and the
heater cover.
2 Disconnect the thermistor from the PCB (CN4
connector).
3
Remove the thermostat bulb
-3-
and the thermistor
-2-
from the same sheath
-1-
.
1
3
2
1
4 Install new one thermistor.
a.
Insert the thermistor
-2-
through the hole of the
heater cover.
b. Apply conductive silicon grease in the sheath -1-
and thermistor -2- to guaranty the contact surface.
c.
Insert the thermistor
-2-
inside the sheath.
d. Insert the thermostat bulb -3- inside the sheath -1- .
1
2
3
e. Connect the thermistor to the PCB (CN4
connector).
f.
Mount the heater cover and fix it with the screws
(x4).
5.2.6 Replacement of the safety thermostat
The safety thermostat is used in case of water gets too
hot.
1 Open the ebox and disconnect all the terminals
connected to the thermostat.
2 Remove the external nut -1- that fixes the thermostat to
the electrical box.
1
3 Remove the screws (x4) of the heater cover and the
heater cover.
4 Remove the thermostat bulb -2- and the capillary -3-
from the sheath -1- .
1
3
1
2
5
Pass the thermostat bulb through the hole of the heater
cover and remove the whole safety thermostat.