Hitachi RHUE-3AVHN, Руководство по обслуживанию

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Troubleshooting
Service Manual
228
Troubleshooting of accessories
SMGB0066 rev.0 - 12/2009
7.6.2. WEH - Water Electric Heater
observed failure Cause Check item Action
Electric power supply
problems in WEH
Control signals from Systems Controls
miss-connected or wrongly connected
Check connections between System
Controller and WEH
Terminals 7, 8, 9 from System Controller
connected to Terminals 7, 8, 9 WEH
respectively
Check Voltage (230V) between
terminals 8/9 and 8/7 in WEH and also
in System Controller
Check Power Supply in System
Controller
Check Voltage (230V) between
Terminals A1 & A2 in Contactor Coils
of WEH
Repair connections if required
WEH has no Power
Terminals L1~L3 have no voltage
(440V/230V)
ELB, CB or Fuse protecting WEH are
activated. There is some short-circuit,
wrong connection or any earth leak
Check cable connections in WEH power
circuit. Repair circuit and replace Fuse
or Switch ON ELB/CB
Check possible miss connections in
WEH power circuit
Check cable connections in WEH power
circuit. Repair circuit.
Check Electric Resistances:
26,5 Ohms (5% Tolerance)
Replace Resistances if required
Problems in Water Circuit
due to low Water Pressure or
no Water in Water Circuit
LWPS is OFF
[Water Pressure < 0,1 MPa]
Check Water Pressure
(must be >0,1MPa)
Fill Water Circuit with enough pressure
(< 0.1MPa)
Check if Water Circuit is locked
Check Valves and Water Circuit to
ensure water circulation
Check if there is Water leaks
Check Water circuit and repair leaks
if exist
Problems in Water Circuit
due to excesive Water
Temperature in Water Circuit
Thermostat Cut-Out activated
[Excesive water temperature (<85ºC)]
Check Water Temperature and
Thermostat state
Push reset button for thermostat re-start
7.6.3. dHWT - domestic Hot Water Tank
Troubleshooting-DHWT-200/300E/S-2,5H1E
observed failure Cause Check item Action
"Electric power supply
problems in DHWT"
"Control signals from Systems Controls
miss-connected or wrongly connected"
"Check connections between System
Controller and DHWT"
Terminals 11, 12 from System Controller
connected to Terminals 3, 4 DHWT
respectively
"Check Voltage (230V) between terminals
N/3 and N/4 in DHWT"
"Check Power Supply in System
Controller"
Check Voltage (230V) between Terminals 7
& 8 in Relay coils of DHWT
Repair connections if required
"DHWT has no Power Terminals L~N
have no voltage (230V)"
"ELB, CB or Fuse protecting DHWT are
activated.
There is some short-circuit, wrong
connection or any earth leak"
"Check cable connections in DHWT power
circuit. Repair circuit and replace Fuse or
Switch ON ELB/CB"
Check possible miss connections in DHWT
power circuit
"Check cable connections in DHWT power
circuit. Repair circuit."
"Check Electric Resistances:
17,7 Ohms (5% Tolerance)"
Replace Resistances if required
"Problems in Water
Circuit due to low Water
Pressure or no Water in
Water Circuit"
[Water Pressure < 0,1 MPa]
"Check Water Pressure
(must be >0,1MPa)"
Fill Water Circuit with enough pressure (<
0.1MPa)
Check if Water Circuit is locked
Check Valves and Water Circuit to ensure
water circulation
Check if there is Water leaks
"Check Water circuit and repair leaks if
exist"
"Problems in Water
Circuit due to excesive
Water Temperature in
Water Circuit"
"Thermostat Cut-Out activated
[Excesive water temperature (<90ºC)]"
"Check Water Temperature and Thermostat
state"
"Push reset button for thermostat re-start"