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[. . . ] 30
7 Refrigeration Cycle / Water System Diagram . 32 7-2. Refrigeration Cycle System Diagram . 35
1
9 Method of Defect Diagnosis . 65 9-1-1. Check the power supply voltage . [. . . ] Check the resistance value and connection of the heat exchange temperature sensor (TE). Check the resistance value and connection of the heat exchange temperature sensor (TL). Check the resistance value and connection of the outdoor temperature sensor (TO). Check the resistance value and connection of the suction temperature sensor (TS). Check the resistance value and connection of the heat-sink temperature sensor (TH). Check for any wrong installation of the heat exchange temperature sensor (TE) and the suction temperature sensor (TS).
1
85 99 85 99 86 99 86 99
F06
O
1
F07
O
1
F08
O
1
F12
O
1
100
F13
O
1
100
F15
O
1
100
F31
O
1
100
H01
O
×
1. Check the power supply voltage (AC230 V±23 V). Over-loaded condition of the refrigeration cycle. Check that the service valve is fully open.
8
91
H02
1 When the input current is more than zero 20 sec or later after the compressor activation and the activation has not been completed. Defect in the current detection circuit
O
× ×
1. Defect of compressor (lock) Replace the compressor. When the water outlet sensor (TWO) detects 60°C during the heating or hot water supply operation. Outdoor fan system error When a DC fan rotor position detection NG, element short circuit, loss of synchronization, or abnormal motor current occurs. Short circuit of the compressor driver element error When an abnormal short circuit of IGBT is detected.
O
×
1. Check that the service valve is fully open. Check the outdoor fan system (including clogging). Check the resistance value of the heat exchange temperature sensor (TL) and the water outlet temperature sensor (TWO). Check the connection of the fan motor cable connector. Check the power supply voltage (AC230 V±23 V). P26 abnormality occurs when operating with the compressor wiring disconnected . . . No abnormality occurs when operating with the compressor wiring disconnected . . . Even if the connection lead wire of the compressor is disconnected, it stops due to an abnormality in the position detection . . . [. . . ] 3) Release the hooks (8 positions) of the fan guard. How to attach 1) Press the hooks (8 positions) with hands from the front side to fix them. Note Check that all the hooks are fixed to the given positions.
Motorized control valve coil
Fan guard
Bellmouth
Outlet cabinet
Hooks
153
12Periodic Inspection Items
For a long-term safe operation of this equipment, perform periodic inspection and parts replacement.
<Inspection items>
Hydro unit (HWS-802**-E, 1402**-E)
1. Insulation measurement (Power source circuit/ Heater circuit) 2. [. . . ]
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