written by www.mbsmpro.com | December 25, 2025
Samsung SD162H‑L4UA R134a 1/5 HP refrigerator compressor 200‑220V 50Hz 220V 60Hz technical data, specifications, performance tables, comparisons and replacement guide
| Parameter |
Samsung SD162H‑L4UA S01 |
Notes |
| Manufacturer |
Samsung |
Hermetic reciprocating compressor. |
| Refrigerant |
R134a |
Optimized for domestic refrigeration. |
| Voltage range |
200‑220V 50Hz / 220V 60Hz |
Single‑phase AC power. |
| Phase |
1Ph, thermally protected |
Internal overload protector. |
| Locked Rotor Amps (LRA) |
5.5 A (label) |
Indicates starting current peak. |
| Typical displacement (family) |
≈ 6–7 cm³ |
Comparable to SD162Q‑L1UA at 6.16 cm³. |
| Motor type |
RSCR / RSIR equivalent |
Relay start with start capacitor, high starting torque. |
| Compliance |
CE, RoHS |
For household appliances in EMEA. |
| Operating condition |
Typical value (SD162 family) |
Comment |
| Displacement |
about 6.1–6.9 cm³ |
Similar frame size to SD162Q‑L1UA (6.16 cm³). |
| Nominal power |
≈ 1/5 HP |
Classified for small refrigerator duty. |
| Evaporating temperature |
−30 °C to −10 °C |
LBP range for fresh‑food and freezer compartments. |
| Condensing temperature |
≈ 54 °C (ASHRAE) |
Standard test condition. |
| Cooling type |
Natural convection shell cooling |
No external fan required. |
| Feature |
Samsung SD162H‑L4UA S01 |
Samsung SD162Q‑L1UA |
ACC GL80AN |
| Refrigerant |
R134a |
R134a |
R134a |
| Nominal HP |
1/5 HP (family) |
1/5 HP |
1/5 HP |
| Displacement |
≈ 6–7 cm³ |
6.16 cm³ |
8.1 cm³ |
| Application |
LBP refrigerator |
LBP refrigerator |
HMBP / beverage coolers |
| Voltage |
200‑220V 50Hz / 220V 60Hz |
220‑240V 50Hz |
220V 50Hz |
| Motor type |
RSCR / RSIR |
PTC‑RSCR |
RSIR |
| Typical use |
Household fridge, small freezer |
Household fridge, 1‑door / 2‑door |
Display coolers, merchandisers |
active and passive electronic components list transistor diode led resistor capacitor inductor ldr thermistor switch variable resistor transformer symbols
| Criterion |
Active components |
Passive components |
| Power requirement |
Need external bias or supply to operate correctly |
Operate without dedicated supply; work from the circuit itself |
| Signal behavior |
Can amplify, modulate, or switch signals |
Cannot amplify; only attenuate, store, or filter |
| Typical role |
Processing, logic, regulation, high‑level control |
Biasing, timing, filtering, matching, energy storage |
| Examples |
Transistors, diodes, ICs, LEDs |
Resistors, capacitors, inductors, transformers, LDRs, thermistors |
| Active component |
Function in a circuit |
Typical HVAC / industrial example |
| Transistor (BJT, MOSFET) |
Amplifies or switches current; acts as electronic valve |
Driving a relay coil, controlling DC fan speed |
| Diode |
Allows current in one direction only; used for rectification and protection |
Bridge rectifier in SMPS, free‑wheel diode on solenoid |
| LED (light emitting diode) |
Indicates status by emitting light when forward‑biased |
Power, alarm, or compressor‑run indicators |
| Photodiode |
Converts light into current; used in sensors and receivers |
Infrared receiver in remote control boards |
| Integrated circuit (IC) |
Combines many transistors/diodes into one package for logic, control, or power conversion |
Microcontroller, driver IC, or op‑amp in control module |
| Seven‑segment display (LED) |
Numeric indicator built from multiple LEDs driven by an IC |
Temperature or error‑code display on controllers |
| Rechargeable/non‑rechargeable battery |
Provides DC supply for memory backup or standalone devices; considered active in many classifications because it delivers energy into the circuit |
RTC backup battery or wireless sensor power source |
| Passive component |
Main function |
Typical use case |
| Resistor |
Limits current, divides voltage, sets bias points |
LED current limiting; feedback networks in SMPS |
| LDR (light‑dependent resistor) |
Changes resistance with light level; part of sensor circuits |
Automatic lighting or ambient‑light sensing |
| Thermistor (NTC / PTC) |
Resistance varies with temperature; used for sensing and inrush limiting |
Temperature probes on coils or defrost sensors |
| Capacitor |
Stores charge, filters noise, stabilizes supply rails |
DC bus smoothing, EMI filtering, start/run capacitors |
| Inductor |
Stores energy in magnetic field; filters current or forms resonant circuits |
Output choke in DC‑DC converter, EMI filter |
| Switch (mechanical) |
Opens or closes circuit path manually or by actuator |
On/off pushbuttons, limit switches |
| Variable resistor / potentiometer |
Adjustable resistance for calibration or user settings |
Set‑point knob on thermostat or speed control |
| Transformer |
Transfers energy between windings; adapts voltage and provides isolation |
Mains step‑down transformer, control transformer |
| Aspect |
Active component example |
Passive component example |
| Signal amplification |
Transistor boosting sensor signal before ADC |
No amplification; resistor network only scales sensor voltage |
| Switching function |
MOSFET turning compressor relay on/off using low‑power logic signal |
Toggle switch manually interrupts line but cannot be gated electronically |
| Power gain |
Audio or gate driver IC increases output power vs. input |
Transformer changes voltage and current but does not create power gain |
| Dependence on supply |
Stops functioning without bias or Vcc |
Still presents resistance, capacitance, or inductance characteristics without dedicated supply |
| Component |
Typical symbol characteristics |
| Transistor |
Three‑terminal symbol (emitter, base, collector or source, gate, drain) with arrow indicating current direction |
| Diode / LED / photodiode |
Triangle‑to‑bar symbol; LED adds outward arrows; photodiode adds inward arrows |
| Resistor / variable resistor |
Zig‑zag or rectangular symbol; arrow or extra terminal for variable types |
| Capacitor |
Two parallel lines (or one curved for polarized electrolytic) |
| Inductor |
Series of loops or rectangles; transformer shows two inductors with coupling bars or core symbol |
| LDR / thermistor |
Resistor symbol with diagonal arrows or small temperature mark to indicate dependency |
3 way ball valve union ball valve male female nickel plated 1 2 3 4 1 inch plumbing hvac water installation
| Valve type |
Typical connection |
Main advantage |
Typical size range |
| 3‑way ball valve (female thread) |
F × F × F threaded |
Easy integration between three fixed pipes |
½″, ¾″, 1″ |
| 3‑way ball valve (nickel plated) |
F × F × F nickel‑plated brass |
Better corrosion resistance and clean appearance |
½″, ¾″ |
| Ball valve male × male |
M × M threaded |
Direct connection into fittings or manifolds |
½″, ¾″, 1″ |
| Ball valve female × male |
F × M threaded |
Ideal between fixed pipe and flexible hose or fitting |
½″, ¾″, 1″ |
| 3‑way ball valve mixed thread |
Combination F/M ports |
Flexible retrofit when threads differ between branches |
½″, ¾″, 1″ |
| Union ball valve double union |
F unions with captive nuts |
Valve can be removed without cutting pipe |
½″, ¾″, 1″ |
| Function |
One 3‑way valve |
Two 2‑way valves |
| Space required |
Compact body, single handle |
Double space, two handles |
| Control |
Single synchronized movement |
Independent operation, risk of wrong sequence |
| Leakage paths |
One stem, three ports |
Two stems, four ports |
| Typical cost |
Higher unit price, lower labor |
Lower unit price, higher labor |
| Feature |
Plain brass body |
Nickel‑plated brass body |
| Corrosion resistance (outer surface) |
Good in dry rooms; sensitive to aggressive atmospheres |
Better in humid and mildly aggressive environments |
| Drinking‑water suitability |
Depends on alloy and certification |
Often designed to meet EN 13828 and drinking‑water standards |
| Visual aspect |
Yellow metallic finish |
Silver‑grey clean finish |
| Cost |
Generally lower |
Slightly higher due to plating step |
| Parameter |
Typical value range |
| Nominal pressure PN |
25–40 bar, non‑shock cold working |
| Temperature range |
0–120 °C for water, up to 150 °C on some models |
| Port type |
Standard or full port according to DIN 3357 |
| Thread standard |
ISO 228‑1 BSPP female and male ends |
| Handle |
Steel lever or butterfly with anti‑corrosion coating |
| Criterion |
Double‑union ball valve |
Fixed threaded ball valve |
| Removal for service |
Loosen union nuts; no pipe cutting |
Usually requires cutting or full disassembly |
| Seal type |
O‑rings in union ends |
Thread sealant or PTFE tape |
| Ideal applications |
Filters, meters, dosing equipment, pumps |
Simple shut‑off on terminal points |
| Initial investment |
Higher hardware cost |
Lower hardware cost |
| Nominal size |
Typical Cv (full open) |
| ½″ (DN 15) |
≈ 14 |
| ¾″ (DN 20) |
≈ 29 |
| 1″ (DN 25) |
≈ 47 |
| Feature |
Ball valve |
Gate valve |
Globe/stop valve |
| Operation |
Quarter turn |
Multi‑turn |
Multi‑turn |
| Flow restriction |
Very low (full port) |
Low to medium |
Medium to high |
| Typical use in ½″–1″ lines |
Shut‑off, diversion, bypass |
Older installations, fire mains |
Throttling or balancing |
| Maintenance |
Low, simple seats |
Prone to stem corrosion |
Higher, more parts |
Maneurop MTZ160HW4VE 13 hp reciprocating compressor R404A R507A R134a R407C 20.3 kW medium temperature cold room applications
| Parameter |
Value |
Notes |
| Compressor family |
Maneurop MTZ160‑4VI |
Medium‑temperature line. |
| Technology |
Hermetic reciprocating |
Piston design. |
| Nominal cooling capacity (50 Hz) |
20.3 kW |
At R404A MBP rating. |
| Motor power supply |
380‑415 V 3~ 50 Hz, 460 V 3~ 60 Hz |
Wide voltage range 340–440 V @ 50 Hz. |
| Motor protection |
Internal overload protector |
Thermally protected windings. |
| Max. operating current |
Around 36 A at 460 V 60 Hz |
Label LR (locked‑rotor) approx. 140 A. |
| Max. condensing temperature |
50 °C |
According to series guideline. |
| Minimum suction gas temp. |
−35 °C |
LP slide TS min. |
| PS design pressure |
22.6 bar |
PED data. |
| Oil type |
Danfoss POE 160PZ |
Factory charge of polyester oil. |
| Compatible refrigerants |
R134a, R404A, R407C, R507A and new blends like R448A/R449A/R452A |
Multi‑refrigerant platform. |
| Model |
Technology |
Refrigerants |
Nominal capacity at 50 Hz |
Typical application |
| MTZ80‑4VI |
Hermetic reciprocating |
R404A/R507A/R407C/R134a |
≈10 kW at MBP. |
Small cold rooms, display cases. |
| MTZ160HW4VE (MTZ160‑4VI) |
Hermetic reciprocating |
R404A/R507A/R407C/R134a |
20.3 kW at MBP. |
Large cold rooms, process cooling. |
| Copeland ZR81KCE |
Hermetic scroll |
R404A/R407C etc. |
≈18–19 kW at AHR MBP conditions. |
Packaged condensing units, rooftop units. |
| Model |
Evaporating range |
Condensing limit |
Refrigerant flexibility |
| MTZ160HW4VE |
Medium‑temp, down to about −25 °C with R404A. |
Up to 50 °C condensing. |
R404A, R507A, R407C, R134a, R407A/F, R448A, R449A, R452A. |
| Copeland ZR scroll |
Medium‑temp, usually not as deep at low evaporating. |
Similar condensing limits depending model. |
Some models have narrower approved refrigerant lists. |
Copeland KCE444HAG Compressor, 3/8 Hp, R134a, 230V 50Hz – Technical Specs and Water Cooler Applications
| Parameter |
Value |
Notes |
| Refrigerant |
R134a |
HFC, medium‑pressure. |
| Nominal horsepower |
0.36 HP (≈3/8 HP) |
Depending on rating condition HBP/CBP. |
| Cooling capacity |
1077 W (HBP), 551 W (CBP) |
At specified EN12900 conditions. |
| Power input |
475 W (HBP), 339 W (CBP) |
Single‑phase operation. |
| Voltage / frequency |
230 V, 50 Hz, 1‑phase |
Typical for water coolers 40–80 L. |
| Motor type |
2‑pole single‑phase induction |
Internally thermally protected. |
| Application group |
High / Medium temperature (HBP / CBP) |
Not suitable for low‑temperature freezing. |
| Compressor cooling |
Fan, about 350 ft³/min |
Forced air cooling around shell. |
| Oil type / volume |
POE, approx. 0.31 L |
Pre‑charged from factory. |
| Approx. internal free volume |
2400 cm³ (81.1 oz) |
Without oil. |
| Model |
Refrigerant |
Nominal HP |
Cooling capacity (approx.) |
Input power |
Typical use |
| KCE444HAG |
R134a |
0.36 HP |
1077 W (HBP), 551 W (CBP) |
475 W (HBP) |
Commercial water/bottle coolers. |
| EGL90AA (GL90AA) |
R134a |
0.25 HP |
227 W (LBP) |
– |
Domestic refrigerators, small LBP cabinets. |
| Model |
Application group |
Evaporating temperature range |
| KCE444HAG |
HBP / CBP |
−17.8°C to +12.8°C. |
| EGL90AA |
LBP |
Around −35°C to −6.7°C in typical LBP charts. |
LG BMG110NHMV inverter compressor R600a 1/4 hp 220‑240V 50/60Hz LBP performance table and comparison with BMG110NAMV and fixed‑speed R600a models
| Parameter |
BMG110NHMV value |
| Manufacturer |
LG Electronics / LG Compressor & Motor |
| Series |
BMG inverter R600a |
| Model |
BMG110NHMV |
| Refrigerant |
R600a (isobutane) |
| Motor type |
BLDC inverter, variable speed |
| Supply |
220–240 V, 50/60 Hz (inverter‑driven, 60–225 Hz) |
| Application |
LBP domestic refrigerator / freezer |
| Speed range |
1200–4500 rpm |
| Test condition |
Evap −23.3 °C / Cond 54.4 °C / ambient 32 °C |
| Nominal capacity at 4500 rpm |
≈ 262 W (894 Btu/h) |
| Input power at 4500 rpm |
≈ 146 W |
| COP at 4500 rpm |
≈ 1.79 W/W (≈ 6.11 Btu/W·h) |
| Speed (rpm) |
Capacity (kcal/h) |
Capacity (W) |
Capacity (Btu/h) |
Power (W) |
COP (W/W) |
EER (Btu/W·h) |
| 4500 |
225 |
262 |
894 |
146 |
1.79 |
6.11 |
| 3000 |
172 |
200 |
683 |
108 |
1.85 |
6.32 |
| 1800 |
108 |
125 |
427 |
72 |
1.75 |
5.97 |
| 1500 |
88 |
102 |
349 |
59 |
1.74 |
5.95 |
| 1200 |
70 |
82 |
279 |
48 |
1.72 |
5.87 |
| Model |
Series |
Nominal hp class |
Capacity at 4500 rpm (W) |
Power (W) |
COP (W/W) |
Typical cabinet volume* |
| BMG089NAMV |
BMG |
≈ 3/16 hp |
217 W |
119 W |
1.83 |
200–260 L refrigerators |
| BMG089NHMV |
BMG |
≈ 3/16 hp |
217 W |
126 W |
1.72 |
high‑efficiency 200–260 L |
| BMG110NAMV |
BMG |
1/4 hp class |
262 W |
144 W |
1.82 |
280–350 L fridges/freezers |
| BMG110NHMV |
BMG |
1/4 hp class |
262 W |
146 W |
1.79 |
280–350 L refrigerators / freezers |
| Feature |
BMG110NHMV (inverter) |
Typical 1/4 hp fixed‑speed R600a compressor |
| Speed control |
1200–4500 rpm via BLDC inverter |
Single speed (≈ 3000 rpm) |
| Nominal capacity |
≈ 262 W at −23.3 °C |
≈ 250–270 W at similar point |
| Input power |
146 W at full speed, 48–108 W at reduced speed |
≈ 180–200 W constant |
| COP / EER |
Up to ≈ 1.85 W/W (6.3 Btu/W·h) |
Typically 1.5–1.6 W/W (5.1–5.5 Btu/W·h) |
| Temperature control |
Smooth, low‑noise modulation |
On/off cycling, higher noise and temperature swing |
| Energy label impact |
Enables A+/A++ energy classes in many markets |
Usually lower efficiency class |
GMCC PE90HME‑4 R134a refrigerator compressor 220‑240V 50/60Hz 265–295 W LBP RSCR motor comparison with PE65H1H‑9 and PE90H1F‑9 models
| Item |
Value / description |
| Brand |
GMCC – Anhui Meizhi Compressor Co., Ltd. |
| Model |
PE90HME‑4 |
| Refrigerant |
R134a, low‑back‑pressure (LBP) range |
| Voltage / frequency |
220–240 V, 50/60 Hz, single‑phase (1Ph) |
| Motor type |
RSCR (resistance start, capacitor run) |
| Displacement |
≈ 9.0 cm³ |
| Cooling capacity |
265–295 W at LBP conditions (−23.3 °C evap, 32.2 °C amb.) |
| Input power |
≈ 1.52–1.55 A rated current at 220–240 V |
| Application |
Static‑cooling domestic and small commercial refrigerators, freezers and coolers |
| Protection |
Internal thermal protector, RoHS environmental compliance |
| Parameter |
Typical PE90HME‑4 values |
| Evaporating temperature range |
−35 °C to −10 °C (LBP) |
| Nominal rating point |
−23.3 °C evap / 32.2 °C ambient / 55 °C condensing |
| Voltage range |
187–254 V (50 Hz) |
| Ambient temperature range |
0–43 °C |
| Max condensing temperature |
60–70 °C |
| Max discharge gas temperature |
130 °C |
| Max winding temperature |
130 °C (internal) |
| Max pump‑down pressure |
≈ 1.82 MPa |
| Model |
Displacement (cm³) |
Cooling capacity at 50 Hz (W)* |
HP class |
Rated current (A) |
Application |
| PE65H1H‑9 |
6.5 |
190–195 W |
1/4 hp |
≈ 1.47–1.55 |
LBP domestic refrigerators |
| PE90HME‑4 |
9.0 |
265–295 W |
1/3 hp class |
≈ 1.52–1.55 |
LBP refrigerators / freezers |
| PE90H1F‑9 |
9.0 |
275–280 W |
1/3 hp+ |
≈ 1.50 |
LBP with wide‑voltage range |
| PE120HMH★ |
12.0 |
320 W |
3/8–1/2 hp |
≈ 1.45 |
L/MBP commercial coolers |
| Checkpoint |
Why it matters |
| Refrigerant |
Must be R134a; conversion from R12 or R600a requires full system redesign. |
| Evaporating temperature |
Ensure design conditions fall inside −35 to −10 °C LBP range. |
| Condenser and capillary sizing |
Match to 265–295 W capacity to avoid flood‑back or high‑head faults. |
| Voltage stability |
Mains should remain within 187–254 V; more unstable grids may justify wide‑voltage models like PE90H1F‑9. |
| Start components |
RSCR start kit (PTC + capacitor) must match GMCC’s specified values to guarantee torque and reliability. |
compressor windings CSR pin configuration common start run terminals, PTC relay overload wiring and multimeter resistance testing guide
| Measurement pair |
Identification rule |
Typical range* |
| C–R |
Run winding (lowest resistance) |
About 1–5 Ω on small fractional‑HP units. |
| C–S |
Start winding (medium resistance) |
Usually 3–11 Ω, often 3–5 times C–R. |
| S–R |
Start + run (highest resistance) |
Equals C–S + C–R by ohm’s law. |
| Motor type |
Components |
Typical use case |
Starting torque |
| RSIR (Resistance Start Induction Run) |
Start relay + start winding, no capacitor |
Small domestic refrigerators, low starting torque. |
Low |
| PSC (Permanent Split Capacitor) |
Run capacitor in series with start winding |
Smooth, efficient operation, good for low starting load. |
Low–medium |
| CSIR (Capacitor Start Induction Run) |
Start capacitor + relay, start winding only during start |
Higher torque for larger compressors up to ≈ 3/4 HP. |
High |
| CSR (Capacitor Start Capacitor Run) |
Start capacitor + run capacitor + potential or current relay |
Very high starting torque for hard‑start conditions. |
Very high |
| Step |
Connection |
Function |
| 1 |
Line (L) feeds the overload protector, which then connects to C |
Overload opens on excessive current or shell temperature. |
| 2 |
Solid‑state relay/PTC connects between C and S with start capacitor in series if CSIR/CSR |
Provides high initial current to start winding, then increases resistance and drops out. |
| 3 |
Line (L) also connects directly to R through the control circuit (thermostat, contactor) |
Supplies continuous voltage to run winding during operation. |
| 4 |
Run capacitor connects between S and R in PSC and CSR systems |
Improves running efficiency and torque. |
Danfoss FR10B 103U2954 hermetic compressor 220–240V 50/60Hz LBP freezer application data and replacement guidance
| Field on label |
Meaning |
Technical notes |
| FR10B |
Danfoss FR‑series hermetic reciprocating compressor, size “10B” |
Part of light commercial range for small refrigeration units. |
| 103U2954 |
Complete compressor code number |
Identifies factory configuration, oil charge and terminal box. |
| 220–240 V ~ 60 Hz / 50 Hz |
Dual‑frequency single‑phase motor |
Designed for 220–240 V at either 50 or 60 Hz mains. |
| LBP / LBP‑HBP |
Low‑back‑pressure and some high‑back‑pressure use |
Suited to freezers (LBP) and certain refrigerator duties (HBP) depending on model variant. |
| LST / HST motor |
Low / high starting torque versions |
CSIR or RSIR motor concepts, depending on accessory set and application. |
| Made in Slovenia |
Manufacturing plant |
Danfoss/SECOP European production facility. |
| Parameter |
Typical value / range |
Source indication |
| Refrigerant |
R12 on legacy 103U2954 versions; R134a on FR10G successors |
|
| Application |
LBP (freezers −30 °C to −10 °C evap); some HBP/MBP possible |
|
| Displacement |
≈ 9.05 cm³ |
FR10G catalog data. |
| Voltage range |
187–254 V at 50 Hz for LBP |
|
| Max ambient temperature |
43 °C |
|
| Max condensing temperature |
60–70 °C continuous/short |
|
| Motor type |
RSIR/CSIR single‑phase |
|
| Oil type / charge |
Polyolester or mineral, ≈ 450 cm³ depending on refrigerant |
|
| Max refrigerant charge |
≈ 900 g |
|
| Weight |
Around 10–11 kg |
|
| Condition |
Capacity (approx.) |
Power input |
Notes |
| Evap −25 °C, cond 55 °C, 220 V / 50 Hz |
~130–150 W refrigerating |
~200–230 W |
FR10G LBP data as reference for FR10B. |
| Evap −15 °C, cond 55 °C |
Higher capacity around 200 W |
Increased input and COP |
Suited for high‑efficiency bottle coolers. |
| Advantage |
Description |
| Proven reliability |
Long‑running Danfoss/SECOP FR platform with global service support. |
| Wide voltage tolerance |
Operates from 187–254 V, useful in markets with unstable mains. |
| Flexible application |
LBP primary, with variants for HBP duties using alternative starting devices. |
| Compact footprint |
Fits tight condensing unit housings and under‑counter cabinets. |
Fresh SFW13C1P-B Split Air Conditioner – Nameplate Data, Error 11.1 Meaning and Pro Troubleshooting
| Parameter |
Typical value / range |
Notes |
| Series / model |
SFW13C / SFW13C1P-B |
Smart digital wall‑mounted split. |
| Type |
Split air conditioner, indoor unit |
Wall hi‑wall design. |
| Nominal horsepower |
1.5 HP |
Residential/light‑commercial class. |
| Cooling capacity |
≈ 12,000 BTU/h |
Catalog values for 1.5 HP Fresh SFW13C. |
| Function |
Cooling only |
No heat pump on this variant. |
| Refrigerant |
R22 |
On older SFW13C inverter range. |
| Voltage |
220–240 V |
Single‑phase supply. |
| Frequency |
50 Hz |
MEA / Africa grid standard. |
| Moisture protection |
IP24 (indoor casing) |
Splash‑resistant enclosure category on label. |
| Sound pressure level |
≈ 39 dB(A) indoor |
Quiet residential operation. |
| Item |
Typical value |
Practical implication |
| Rated current (cooling) |
≈ 6–7 A |
Used to check running load. |
| Maximum current |
≈ 25 A |
Used for MCB / fuse rating margin. |
| Rated input power |
≈ 1,560 W |
Helps estimate energy consumption. |
| Isolation / protection |
25 A marking, IP24 |
Indoor unit protection coordination. |
| Possible cause |
Description |
Reference behavior |
| Loose or oxidized interconnecting terminals |
Poor contact on indoor–outdoor signal cable can interrupt data communication. |
|
| Wrong wiring sequence |
Reversed communication cores (e.g., terminals 2–3 swapped) lead to serial transfer errors. |
|
| Damaged communication cable |
Mechanical damage or moisture ingress causes intermittent signal loss. |
|
| PCB failure |
Indoor or outdoor main board cannot generate or read serial signal. |
|
| External electrical noise |
Strong interference, bad earthing or voltage dips disturb the serial bus. |
|