Toshiba MMY-MAP0806HT7(J)P, Руководство по обслуживанию

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(*2) Checking the oil return circuit from oil separator and clogging in
SV3D valve
a)
Oil return circuit
•
While outdoor unit is operating, check temperature (secondary side of capillary) on oil return circuit. ((6) in the figure.)
If temperature is low equivalent to suction temperature), a clogging of strainer of oil return circuit or
capillary is considered. Replace the clogged part.
b)
Clogging check for SV3D valve
•
While outdoor unit is operated, set up SW01/02/03 = [2] [1] [3] (7-segment display [Hr] [... ... ...]), and push SW04 for 2 seconds or more.
•
Set up SW02 = [9], and turn on SV3D valve. (7-segment display [Hr] [... 3 d])
•
If temperature is low at secondary side of the valve or it does not change, clogging of valve, capillary
,
or strainer is considered. ((7) in the figure.) Replace the clogged part.
In some cases, it may be dif
ficult to check the leakage of clogging in the following condition of refrigerant
stagnation in low ambient temperature condition. In this case, take a longer operating time prior to check. (Criterion: Discharge temperature of
TD1 and
TD2 are 60°C or higher)
(*1) Checking leakage and clogging on solenoid valves
a)
Leakage check for SV3A
valve (For multiple outdoor unit system)
•
T
urn of
f the power supply
, take of
f connector of SV3A
valve, and then start a test operation after
power-ON.
•
Check the temperature change at secondary side of SV3A
valve during operation . ((1) in the figure.)
If temperature is raised, leakage occurs in the SV3A
valve. Replace SV3A
valve.
b)
Leakage check for SV3C valve •
T
urn of
f the power supply
, take of
f connector of SV3C valve, and then start a test operation after
power-ON.
•
After operation for several minutes, check temperature at secondary side of SV3C valve. ((2) in the figure.)
If temperature is high (equivalent to discharge temperature
TD), leakage occurs in the SV3C valve.
Replace SV3C valve. (Even if leakage does not occur in the SV3C valve, temperature of SV3C valve at secondary side rises during operation. But the temperature is lower than
TD when there is no leakage.)
c
)
Clogging check for SV3B valve (For multiple outdoor unit system) •
While outdoor unit is operated, set up SW01/02/03 = [2] [1] [3] (7-segment display [Hr] [... ... ...]), and push SW04 for 2 seconds or more.
•
Set up SW02 = [10], and turn on SV3A, SV3B, SV3C valves. (7-segment display [Hr] [... 3 -])
•
While outdoor units are operating, check temperature change at secondary side of SV3B valve. ((4) in the figure.)
If temperature does not rise (equivalent to suction temperature), it is a clogging of SV3B valve.
Replace SV3B valve.
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