12-2
CONTROL SYSTEM
Revision Y05-01
Service Manual - ALPHA
12.2 Legend
AC -
Alternate
Current
A/C -
Air-Conditioner
ANY
- ON or OFF status
CLOCK
- ON/OFF Operation Input, (dry contact)
COMP -
Compressor
CPU
- Central Processing Unit
ELUM
- Extended Louver Upward Movement (Software Jumper)
E²PROM, EEP
- Erase Enable Programmable Read Only Memory
HE -
Heating
Element
HPC
- High Pressure Control
H/W -
Hardware
ICP
- Indoor Condensation Pump
ICT
- Indoor Coil Temperature (RT2) sensor
IF, IFAN
- Indoor Fan
IR -
Infra
Red
LEVEL1
- Normal Water Level
LEVEL2/3
- Medium/High Water Level
LEVEL4 -
Overflow
Level
Max -
Maximum
Min -
Minimum
min
- Minute (time)
NA -
Not
Applicable
OCP
- Outdoor Condensation Pump
OCT
- Outdoor Coil Temperature (RT3) sensor
OF, OFAN
- Outdoor Fan
OPER -
Operate
Para. -
Paragraph
RAT
- Return Air Temperature (RT1) sensor
RC
- Reverse Cycle (Heat Pump)
R/C -
Remote
Control
RCT
- Remote Control Temperature
RH
- Resistance Heater
RT
- Room Temperature (i.e. RCT in IFEEL mode, RAT otherwise)
RV
- Reversing Valve
SB, STBY
- Stand-By
sec -
Second
(time)
Sect -
Section
SH -
Supplementary
Heater
SPT
- Set Point Temperature
ST
- Standard (a Model with Cooling Only)
S/W -
Software
TEMP -
Temperature
W/O -
Without
WVL
- Water Valve
∆
T
- The difference between SPT and RT.
in Heat Mode:
∆
T = SPT-RT
in Cool/Dry/Fan Mode:
∆
T = RT-SPT
