Toshiba MMC-P0151H, Руководство по обслуживанию

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3-49
Check
code
Detected
position
Check
code name
Cause
(Position)
Trouble detection
condition
Check item (Position)
A6 Interface Discharge
temp. TD1
alarm
Discharge
temp. (TD1)
protective
operation Protective stop was
repeated for more than
three times when discharge
temp. TD1 exceeded 130°C. • Check outdoor service valve
(Gas side, liquid sides) fully open.
• Check for blockage of outdoor PMV.
1) Refrigerant choke circuit (PMV A)
2) Cooling bypass circuit (PMV B)
3) Liquid line check valve
(Cooling only model)
• Check characteristics of TD1 sensor
resistance value.
• Check 4-way valve error.
A7 Interface TS
condition
gas leak
detection
Suction temp.
protective
operation
(TS1) Protective stop when status
suction temp. TS is above
the criteria temp. continues
for 10 minutes and repeats
for three times or more.
<TS alarm criteria temp.>
In cooling : 60°C or more
In heating : 40°C or more • Check refrigerant shortage.
• Check outdoor service valve (gas side, liquid
sides) fully open.
• Check for blockage of outdoor PMV.
1) Refrigerant choke circuit (PMV A)
2) Cooling bypass circuit (PMV B)
3) Liquid line check valve
(Cooling only model)
• Check characteristics of TS1 resistance value.
• Check 4-way valve error.
AA Interface Pd sensor
alarm
High-
pressure Pd
sensor Pd sensor output voltage is
zero (Sensor open). • Check connection of Pd sensor connector.
• Check Pd sensor error.
• Check outdoor P.C. board (Interface) error.
Ab Interface Mis-
connection
of pressure
sensor
Miswiring of
pressure
sensor
(Pd, Ps) • High-pressure Pd sensor
and Low-pressure Ps
sensor were exchanged.
• Output voltage of both
sensors are zero.
• Check connection of high-pressure Pd sensor
connector.
• Check connection of low-pressure Ps sensor
connector.
• Check pressure sensor Pd and Ps error.
• Check outdoor P.C. board (Interface) error.
• Check miswiring of fixed-speed compressor
terminal. (Inverse operation of fixed-speed
scroll compressor)
• Check compressor compressing error.
AE Interface Detection of
TD1
condition
gas leak
Discharge
temp. up
when small
capacity of
indoor
operates.
(TD1) Protective stop when
discharge temp. TD1
detected 110°C or more
under condition that
inverter compressor
operated with low
frequency and repeats for
three times. • Check refrigerant shortage.
• Check 4-way valve error.
• Check for blockage of outdoor PMV.
1) Refrigerant choke circuit (PMV A)
2) Cooling bypass circuit (PMV B)
3) Liquid line check valve
(Cooling only model)
• Check characteristics of TD1 sensor
resistance value.
• Check for blockage of indoor filter.
• Check for blockage of pipe.
AF Interface Phase
order alarm
Miswiring of
phase order
or missing
one phase of
outdoor Phase order error or
missing one phase was
detected when power was
turned on. • Check phase order missing phase of outdoor
power supply wiring.
• Check outdoor P.C. board (Interface) error.
b4 Interface Ps sensor
alarm
Low-pressure
Ps sensor • Ps sensor output voltage
was zero.
• Ps pressure detected
continuously 0.95MPa or
less during operation.
• Misconnection of connector between Pd
sensor and Ps sensor.
• Check connection of Ps sensor.
• Check Ps sensor error.
• Check compressor error.
• Check 4-way valve error.
• Check outdoor P.C. board (Interface) error.