Toshiba MMC-P0151H, Руководство по обслуживанию

Страница: 54 / 216

3-51
Check
code
Detected
position
Check code
name
Cause
(Position)
Trouble detection condition Check item (Position)
bE Interface Low pressure
protective
operation
Protection
when low
pressure Ps
lowered. Low pressure Ps detected
lower than 0.02MPa. • Check for refrigerant shortage.
• Check outdoor service valves.
(Gas side, Liquid side are fully open.)
• Check for blockage of outdoor PMV.
1) Refrigerant choke circuit (PMV A)
2) Liquid line check valve
(Cooling only model)
• Check discharge temp. TD sensor
error.
• Check low pressure Ps sensor error.
• Check indoor filter blockage.
• Check refrigerant pipe blockage.
• Check outdoor fan operation.
(In heating)
cF Indoor Communication
error between
indoor MCU Lead wire
between indoor
main P.C.
board (MCC-
1361) and
indoor motor
P.C. board
(MCC-1382)
Communication between MCU
interrupted for 50 seconds.
• Check connection between connector
(CN28) of indoor main P.C. board
(MCC-1361) and connector (CN27) of
indoor motor P.C. board (MCC-1382).
• Check failure of indoor main P.C.
board (MCC-1361).
• Check failure of indoor motor P.C.
board (MCC-1382).
d1 Interface Outdoor
inverter set up
alarm
Outdoor
inverter units
are duplicated. There were multiple outdoor
inverter units in 1 line. • Check No. of connected inverter
outdoor units.
• Check SW08/bit 2 set up on outdoor
P.C. board (interface).
• Check outdoor P.C. board (interface).
d2 Interface Fixed-speed
outdoor unit
alarm
Fixed-speed
outdoor unit
protection Inverter outdoor unit received
an alarm code from fixed-
speed outdoor. • Check the check code of fixed-speed
outdoor unit.
• Convenient functions
If keeping SW04 pushed for 5 seconds
or more under condition that [d2] is
displayed on the 7 segment display of
the inverter outdoor, fan of the outdoor
unit which stops in emergency
operates.
If keeping SW04 and SW05 pushed
concurrently, the normal outdoor unit
fan operates.
If pushing SW05 alone, the fan
operation is released.
d3 Inverter TH sensor
alarm Temp. sensor
(TH) to detect
overheating of
IPDU
microprocessor Sensor resistance value was
infinity or zero (Open, Short). • Temp. sensor incorporated with IGBT
has failed.
→
Replace IPDU P.C.
board.
d4 Interface TK1 sensor
alarm
Temp. sensor
(TK1) to detect
oil level Sensor resistance value was
infinity or zero (Open, Short). • Check connector connection of TK1
sensor.
• Check characteristics of TK1 sensor
resistance value.
• Check outdoor P.C. board (interface)
error.
d5 Interface TK2 sensor
alarm
Temp. sensor
(TK2) to detect
oil level Sensor resistance value was
infinity or zero (Open, Short). • Check connector connection of TK2
sensor.
• Check characteristics of TK2 sensor
resistance value.
• Check outdoor P.C. board (interface)
error.