Operation Lamp - Sanyo XS1872 Technical & Service Manual

(1) Self-diagnostics Lamps
INDOOR UNIT
Since the indications cover various units, the corresponding parts listed below may not be present in some models.
Indication on indoor unit
OPERATION Timer HIGH POWER
TIMER
BLINKING (3 SEC. INTERVAL)
LAMP
Code Diagnostics items
S01
Room temperature sensor failure
S02
Indoor heat exchanger sensor failure
S04
Compressor temperature sensor failure
S05
Outdoor heat exchanger sensor failure
S06
Outdoor air temperature sensor failure
Outdoor electrical current detection
S07
failure
Indoor/outdoor communications failure
E01
(serial communications)
• HIC circuit failure
E02
• Power Tr (transistor) circuit failure
Outdoor unit external ROM (OTP data)
E03
failure
E04
Peak current cut-off
PAM circuit failure
E05
Active circuit failure
Compressor discharge overheat
E06
prevention activated.
E07
Indoor fan operating failure
4-way valve switching failure
E08
Indoor zero-cross failure
E09
No-refrigerant protection
E10
DC compressor drive circuit failure
E11
Outdoor fan operating failure
Outdoor system communications failure
OLR operation
E12
Outdoor power supply open phase
Outdoor coil freezing
E13
Freeze-prevention operation activated.
FLOAT SWICTH (FS) IS ACTIVED.
OPERATION button

OPERATION lamp

TIMER lamp
HIGH POWER lamp
REMOTE CONTROL receiver
.... OFF .... Blinking
Diagnostics contents
(1) Sensor open circuit or short circuit
(2) Contact failure at connector or open circuit at terminal crimping location
(3) Indoor/outdoor PCboard failure
(1) Sensor open circuit or short circuit
(2) Contact failure at connector or open circuit at terminal crimping location
(3) Outdoor PCboard failure
Outdoor PCboard failure
(1) Mis-wiring (2) AC power failure (3) Blown fuse (4) Power Relay failure
(5) Indoor or outdoor PCboard failure (6) Outdoor Fan Motor failure (7) Reactor failure
(8) High-Pressure Switch failure (9) Overload Relay failure (10) Magnetic Coil failure
* See detailed flowchart in this section.
(1) HIC or power Tr failure (2) Outdoor fan does not turn. (3) Instantaneous power outage
(4) Service valve not opened. (5) Outdoor fan blocked. (6) Continuous overload operation
(7) Compressor failure (8) Outdoor PCboard failure
(1) External ROM data failure (2) Outdoor PCboard failure
(1) Instantaneous power outage (2) HIC or power transistor failure
(3) Outdoor PCboard failure
(1) Outdoor PCboard failure (2) Outdoor power supply voltage failure
(1) Electric expansion valve failure (2) Capillaries choked (3) Shortage of refrigerant
(4) Continuous overload operation (5) Outdoor fan does not rotate (6) Outdoor PCboard failure
(1) Fan motor failure (2) Contact failure at connector (3) Indoor PCboard failure
(1) 4-way valve failure (heat pump model only)
(2) Outdoor PCboard failure
(1) Service valve not opened. (2) Shortage of refrigerant
(1) Open phase (2) Outdoor PCboard failure
(1) Fan motor failure (2) Contact failure at connector (3) Outdoor PCboard failure
(1) Mis-wiring (2) Blown fuse (3) Power Relay failure (4) Outdoor PCboard failure
(5) Compressor failure
* See detailed flowchart in this section.
(1) Indoor fan system failure (2) Shortage of refrigerant (3) Low-temperature operation
(1) DRAIN PUMP FAILURE (2) FS FAILURE (3) CHOKED DRAIN HOSE
55
.... ON (Illuminated)