Toshiba HFC series, Руководство по установке

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Hydro Unit
Installation Manual
12
Troubleshooting
„
Fault symptoms
Defect mode detected by the Hydro Unit
Symptom Possible cause Corrective action
Room is not heated or
cooled.
Water is not hot enough.
Incorrect remote controller setting
Check remote controller operation and temperature
setting
Incorrect function code setting Check function code setting with the function code table.
Backup heater disconnected Check backup heater and bimetal thermostat.
Insufficient capacity Check selection of equipment.
Sensor defect
Check whether temperature sensor is installed at the
normal position.
Nothing is displayed on the
remote controller.
Power is not supplied. Check power supply wiring.
Incorrect setting
Check DIP switch setting on the Hydro Unit board.
Check the setting with the function code table.
Flow rate switch is
activated.
Error code [A01]
Air bite in the pump Release air completely according to the procedure.
Low hydraulic pressure
Set hydraulic pressure considering pipe height, and
replenish water until manometer shows a value of set
hydraulic pressure or more.
Strainer is clogged. Clean the strainer.
Large resistance on the hydro side
Widen water path to the hydro unit or adopt a bypass
valve.
Malfunction of motorized 3-way valve
for hot water supply
Check wiring and parts.
Hot water leaks from
pressure relief valve.
Excessive hydraulic pressure
Set hydraulic pressure considering pipe height, and
replenish water until manometer shows a value of set
hydraulic pressure or more.
Insufficient capacity of expansion tank
Check expansion tank capacity compared to total water
amount. If it is insufficient, install another expansion
tank.
Expansion tank failure Check the air pressure.
O ... Possible
× .... Not possible
Check
code
Diagnostic functional operation
Determination and action
Operational cause
Backup
present
Automatic
reset
A01
Pump or flowing quantity error
1) Detected by TC sensor
× ×
1. Almost no or little water flow.
• Not enough vent air
• Dirt clogging in the water piping system.
• The water piping is too long.
• Installation of buffer tank and secondary pump
2) Detected by flow switch abnormality
3) Detection of chattering abnormality
in the flow switch input
4) Disconnection of the flow switch
connector
1. Disconnection of the flow switch connector.
2. Defect of the flow switch.
A02
Temperature increase error
(heating)
(TWI, TWO, THO)
Heating
O
Hot water
×
O
1. Check the water inlet, water outlet and heater outlet
(TWI, TWO, THO) sensors.
2.Defect of the backup heater (defect automatic
reset thermostat).
A03
Temperature increase error (hot
water supply)
(TTW)
Heating
O
Hot water
×
O
1. Check the hot water cylinder sensor (TTW).
2. Check the hot water cylinder thermal cut-out.
40-EN