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38GXM/40GXM Service Training

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Presentation on theme: "38GXM/40GXM Service Training"— Presentation transcript:

1 38GXM/40GXM Service Training

2 GXM XPOWER MULTI HIGH WALL SYSTEM Up to 14
GXM XPOWER MULTI HIGH WALL SYSTEM Up to 14.5 SEER (18K to 30K) Heat Pump Rated combinations Features: Inverter Compressor Technology Condensing unit: 18, 24, 30K Fan coils: 9, 12, 18K Up to 14.5 SEER and 8.5 HSPF Connect up to 51K fan coils to 30K (4:1) condensing unit Add additional fan coils later First fan-coil determines cooling / heating mode Wireless controller only (Deg C and F) 9K 9K 18K 2:1 12K 12K 24K 2:1 9K 9K 9K 30K 4:1 9K

3 GXM XPOWER MULTI HIGH WALL SYSTEM Up to 20 Combinations

4 Indoor Wired From Outdoor Indoor Wired Separately
POWER WIRING From outdoor / independent Model Indoor Wired From Outdoor Indoor Wired Separately GX / GXM Yes

5 MVC/MVQ/GXC/GXQ/RAS/RAV
INTERCONNECTING WIRING CABLE REQUIREMENTS Model Conduit Required Type Of Wire Gauge – 50 ft Gauge 50 – 150 ft Gauge – 200 ft MVC/MVQ/GXC/GXQ/RAS/RAV Yes* 4 individual conductors min. 2/64” 60°C Ins. Minimum 14 AWG Use conduit if required by NEC and local codes Back to main menu

6 USER INTERFACE Wireless controllers - Carrier
System GXM (Multi) ºC/ºF convertible Yes Timer 12 Hour Range 25 feet Dedicated AC or HP HP Only Standard / Optional Standard

7 CARRIER DFS FAMILY OPERATING RANGE – GXM
NO LOW AMBIENT CONTROLS AVAILABLE

8 Refrigeration Components
Metering Device – Electronic Expansion Valves in Outdoor Unit Reversing Valve – Energized in Heating

9 REFREGERANT PIPING 38GXM/40GXM series allowable line lengths/sizes
Back to main menu

10 REFREGERANT PIPING 38GXM/40GXM series conversion joints
Back to main menu

11 LONG-LINE GUIDES 38GXM/40GXM series additional charge and capacity reduction Back to main menu

12 18 AND 24K Diagnostic Chart

13 30K Diagnostic Chart - General

14 30K Diagnostic Chart - Specific

15 18K WIRING DIAGRAM

16 24K WIRING DIAGRAM

17 30K WIRING DIAGRAM

18 Flow Chart 1 – HIGH PRESSURE SWITCH PROTECTION
Is unit running in outdoor ambient higher than 115 °F? Yes Beyond operating range No No No Clean coil. Problem persists? Outdoor coil clean? Problem solved Yes Yes Check pressure switch. Ok? No Replace switch Yes Connect low side gauges, compare readings. Are they similar? No All low side pressures are high ? Yes Check EXV output on main board. Ok? Yes Replace EXV Yes Yes No System over charged. Reclaim and weigh in charge Check motor output on main board. Ok? No Replace main outdoor board Yes Replace motor

19 Flow Chart 1 – HIGH PRESSURE SWITCH PROTECTION
Is unit running in outdoor ambient higher than 115 °F? Yes Beyond operating range No No No Clean coil. Problem persists? Outdoor coil clean? Problem solved Yes Yes Check pressure switch. Ok? No Replace switch Yes Connect low side gauges, compare readings. Are they similar? No All low side pressures are high ? Yes Check EXV output on main board. Ok? Yes Replace EXV Yes Yes No System over charged. Reclaim and weigh in charge Check motor output on main board. Ok? No Replace main outdoor board Yes Replace motor

20 Flow Chart 2 – COMPRESSOR HIGH DISCHARGE TEMPERATURE
Is unit running in outdoor ambient higher than 115 °F? Yes Beyond operating range No No No Clean coil. Problem persists? Outdoor coil clean? Problem solved Yes Yes Check compressor discharge temp. thermistor. Chart 9, ok? No No Replace thermistor. Problem persists Problem solved Yes Yes Connect low side gauge at suction service valves. All values low? Yes No Check EXV outputs on main board? OK Replace main board Yes Yes Low charge. Reclaim and weigh in new charge. Replace EXV

21 Flow Chart 3 – Communication Error
Check the wires (type) and connections between outdoor and indoor units . No Fix connection or replace wiring. Problem resolved? Yes Turn all indoor units on. Do they all display error code? Replace indoor unit board in unit displaying error. Problem resolved? No Yes No further action required No Yes Is electric box B fuse burnt out? Yes Check PFC board. OK? Chart # 13 No Replace PFC/Driver board assembly No Yes Yes Check outdoor main board. Chart # 14 OK? Replace PFC/Driver board assembly . No Replace outdoor main board. Problem resolved? No Yes No further action required

22 Flow Chart 4 – IPM MODULE PROTECTION
No Turn power off. Unplug P,N,U,V,W wires. Check resistance between P-N, U-N, V-N, W-N. Is resistance 0? Is red LED1 blinking 3 or 10 times? Yes Replace PFC/Driver board assembly Yes No Red LED1 is blinking 3 times. Check wiring to P,N,U,V,W. Wiring OK? No Is red LED1 blinking 10 times? Fix wiring Yes Yes IPM module over heated. Check that the thermal grease is evenly spread, the screws are tightened, and the heat sink is not blocked. Turn unit on. Is the voltage between P and N 310 V when the compressor is off and 380V when compressor is on? No Check PFC module. Chart # 13 Yes Check for current imbalance Between U,V,W. Readings normal? No Replace PFC/Driver board assembly Yes Replace compressor

23 Flow Chart 5 – Compressor Over Current Protection
Is unit running in outdoor ambient higher than 115 °F? Yes Beyond operating range No No No Clean coil. Problem persists? Outdoor coil clean? Problem solved Yes Yes Check motor output on outdoor board. Ok? No Check compressor. Refer to Chart #15 Yes No Outdoor motor ok? Replace motor Yes Connect low side gauge at suction service valve. Suction pressure normal? No High suction? Yes Yes Unit is overcharged. Reclaim charge and weigh in correct charge. Check compressor. Refer to Chart # 15

24 Flow Chart 6 – OUTDOOR HIGH CONDENSING TEMPERATURE
Is unit running in outdoor ambient higher than 115 °F? Yes Beyond operating range No No No Clean coil. Problem persists? Outdoor coil clean? Problem solved Yes Yes Check outdoor coil temperature thermistor. Chart #9. OK? No No Replace thermistor. Problem persists Problem solved Yes Yes Check motor/thermistor/ outputs on outdoor board. OK? Yes Replace outdoor motor No Replace outdoor board

25 Flow Chart 7 – INDOOR HIGH TEMPERATURE
Is unit running in outdoor ambient higher than 75 °F? Yes Beyond operating range No No No Indoor coil/filter clean? Clean coil and filter. Problem persists? Problem solved Yes Yes Check Indoor coil temperature thermistors. Chart # 9. ok? No No Replace thermistor. Problem persists Problem solved Yes Yes Check motor/thermistors output s on indoor board. Ok? Yes Replace indoor motor No Replace indoor board

26 Flow Chart 8 – Indoor Freeze Protection
No Is system running within operating envelope? System should not be operated Yes Connect low side gauge at suction service valves. All values low? Yes Check for leaks. No Yes Clean indoor coil /filter of indoor unit with error message. Problem fixed? Reclaim charge and fix leak. Problem solved No No Check indoor thermistors OK? Replace thermistor Weigh in charge. Yes Check indoor board motor/ thermistor output Output ok? No Replace indoor board. Yes Replace motor .

27 Flow Chart 9 – Temperature Sensor
Reset main power and restart system using remote. Problem persists? No No further action is required Yes Check sensor connector at ID or OD board Connection good? No Fix connection Yes Check sensor resistance. Appendix -- No Replace sensor Yes Replace indoor or outdoor main board

28 Flow Chart 10 – COMPRESSOR OVERLOAD PROTECTION
Is unit running in outdoor ambient higher than 115 °F? Yes Beyond operating range No No No Clean coil. Problem persists? Outdoor coil clean? Problem solved Yes Yes Check compressor overload switch Ok? No No Replace switch Problem persists Problem solved Yes Yes Connect low side gauge at suction service valves. All values low? No No Check EXV outputs on main board? OK Replace main board Yes Yes Low charge. Reclaim and weigh in new charge. Replace EXV

29 Flow Chart 11 – STARTUP FAILURE/INVERTER FAILURE/CURRENT IMBAL.
No Check Compressor Replace Compressor Yes No Yes Check main board. Chart # 14. OK? Replace main board. Problem resolved? No further action required No Yes No Check PFC board. Chart # 13. OK? Replace PFC/Driver board assembly Yes Replace PFC/Driver board assembly

30 Flow Chart 12 – Compressor Stops
Yes Reset circuit breaker. Problem solved? No further action required No No Yes Check main board. Chart # 14. OK? Replace main board. Problem resolved? No further action required No Yes No Check PFC board. Chart # 13. OK? Replace PFC/Driver board assembly Yes Replace PFC/Driver board assembly

31 Flow Chart 13 – PFC Protection
Check the following when unit is off Turn unit off. Check resistance between PN and N on AP2. Resistance =0? Yes Replace PFC and IPM assembly .Problem solved? Yes No additional action is required No No Unit off. Check resistance between AC-L1 and AC-N1. Resistance =0? Yes Replace PFC and IPM assembly . Problem solved? Yes Problem solved Yes No Unit off. Check resistance between AC-N3 and AC-L3. Resistance =0? Yes Replace PFC electric inductance No Check heat sink. Coil clean, thermal grease spread evenly, screws tight? Yes Fix problem .

32 Flow Chart 13 – PFC Protection CONTINUED
Check the following when unit is on Check outdoor main board. Chart # 14. Problem solved? Is there power between AC-L1 and AC-N1? No Yes No additional action is required. Yes No Replace PFC and IPM assembly. Problem solved? Is there voltage between PR and N? No Yes No additional action is required. Yes No Is the voltage between PR and N 310 when comp. is on(instead of 380V)? Check connections on 3 wires between AP2 and AP3. Connection good? Yes No Fix connection. Problem solved? No No Yes Check 5 wire connection Between AP3 and main board. Connection OK? No Protection due to external power fluctuation Fix connection. Problem solved? Yes No . Replace PFC and IPM assembly

33 Flow Chart 14 – MAINBOARD CHECK
No Check source of problem and fix. Replace fuse or boards. Problem solved? Yes Check fuses (3 fuses). OK? No further action is required No Yes Check inputs and outputs starting at XT1.Inputs/outputs OK? No Replace board Yes Board is OK

34 Flow Chart 15 – COMPRESSOR CHECK
Check resistance of compressor. Resistance OK? No Replace compressor Yes No Check PFC board. Chart #13 OK? Replace PFC/Driver board assembly. Problem solved? No Yes No Check IPM module. Chart # 4 OK? Replace PFC/Driver board assembly. Problem solved? No Yes Replace compressor

35 Flow Chart 16 – Indoor Fan No Yes No Yes No Yes Reset main power and
restart system using remote. Problem persists? No No further action is required Yes No Check motor connection. Connection good? Fix connection Yes Check IFM output and and input on indoor board. Values good? No Replace indoor board Yes Replace indoor fan motor

36 INPUT/OUTPUT CHART

37 Resistance Chart - 20K

38 Resistance Chart - 50K


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