Carrier 42HQE - 38YE User manual

42HQE - 38YE
SERVICE MANUAL
42HQE022N
38YE022

Service Manual
Split Wall-Mounted Type
Room Air Conditioner
(ALLEGRO SERIES)
Model applied:
42HQE022N/38YE022

Contents
1. Features 60
2. Specification 61
3. Dimensions 67
4. Refrigeration cycle diagram 70
5. Operation limits 71
6. Wiring diagram 72
2
7. Specification of electrical parts
8. Troubleshooting 80
3
4
6
7
8
9
10
11
11
15
9. Electronic function
10. Exploded view and spare parts list

3
1. Features
1.1 Compact design.
1.2 Quiet operation.
1.3 Anti-icing function at cooling mode.
1.4 Anti-cold air function at heating mode.
1.5 Auto-defrosting and heating recovering function at heating mode.
1.6 Outdoor unit overload current protection.
1.7 Restart function.
1.8 24 hours on/off mode time setting.
1.9 Error self diagnosis function.

4
2.Specification
Model 42HQE022N/38YE022
Power supply Ph-V-Hz 1, 220-240V~, 50Hz
Capacity Btu/h 21500
Rated Input W 2480
Rated current A 11
Cooling
EER W/W 2.54
Capacity Btu/h
25000
Rated Input W
2550
Rated current A 11.4
Heating
COP W/W
2.87
MoistureRemoval L/h 2
Max. input consumption W 3200
Max.current A 16
Startingcurrent A 63
Model PG420X3CS-4KU1
Type Rotary
Brand GMCC
Capacity Btu/h 25900
Input W 2490
Rated current(RLA) A 11.6
Thermal protector Internal
Capacitor uF 50
Compressor
Refrigerant oil ml RB68AF/T68/α68TF 950
Model YDK36-4G
Brand Welling
Input W 66/65/63 (36)
Capacitor uF 2µF/450V
Indoor fan motor
Speed(hi/mi/lo) r/min 1050/960/860
a.Number of rows 2
b.Tube pitch(a)xrow pitch(b) mm 21X13.37
c.Finspacing mm 1.3
d.Fin type (code) Hydrophilic aluminium
e.Tube outside dia.and type mm Ф7,innergroove tube
f.Coil length x height x width mm 810X357X26.74
Indoor coil
g.Number of circuits 4
Indoor fan Type mm Crossflow
Indoor air flow (Hi/Mi/Lo) m3/h 1050/950/850
Indoor Sound pressure (Hi/Mi/Lo) (LPA) @cooling dB(A) 48/45/42
Indoor Sound power (Hi/Mi/Lo) (LWA) @cooling dB(A)
Dimension (W*H*D) mm 1080X330X222
Packing (W*H*D) mm 1165X445X320
Indoor unit
Net/Gross weight Kg 17/22

5
Model YDK53-6K
Brand Welling
Input W 125
Capacitor uF 3.5
Outdoor fan motor
Speed r/min 800
a.Number of rows 2
b.Tube pitch(a)xrow pitch(b) mm 25.4x22
c.Finspacing mm 1.4
d.Fin type (code) Hydrophilic aluminium
e.Tube outside dia.and type mm Ф9.53,innergroove tube
f.Coil length x height x width mm 797X660X44
Outdoor coil
g.Number of circuits 4
Outdoor fan Type and Diameter mm Propeller
Outdoor air flow m3/h 2500
Outdoor Sound pressure (LPA) @cooling dB(A) 59
Outdoor Sound power (LWA) @cooling dB(A)
Dimension(W*H*D) mm 845X695X335
Packing (W*H*D) mm 970X770X395
Outdoor unit
Net/Gross weight Kg 62/67
Refrigerant type R407c g 2000
Designpressure MPa 2.8
Liquid side/ Gas side mm(inch) Ф9.53/Ф16.0
Max. refrigerant pipe length m 20
Refrigerant piping
Max. difference in level m 10
A
dditional refrigerant charge
over 5m g/m 65
Main mm Φ3.6*2.1*700
Expansion device (Capillary) Sub mm Φ3.6*2.1*600
Operationtemp ℃17-30
A
mbienttemp ℃—7-43
A
pplication area m2 34~49
Remarks:
1.Cooling capacities are based on indoor air temp. 27℃DB, 19℃WB and outdoor air temp. 35℃DB,
and 24℃WB. Heating capacities are based on indoor air temp. 20℃DB, 15℃WB and outdoor air
temp. 7℃DB, and 6℃WB.
2. Indoor Sound Pressure level is measured in free field (JIS 9612 std) at 1m distance.
Outdoor Sound Pressure level is measured in hemispherical field, at 4m distance from the unit.
these values are normally somewhat different as a result of ambient condition.

3. Dimensions
3.1 Indoor unit 42HQE022N
3.2 Outdoor unit 38YE022
12. 5
6

4. Refrigeration cycle diagram
Cooling & heating
Indoor unit outdoor unit
7
Auxiliary accumulator for 12K
Valve
Sensor of room temp
. 4wayvalve
Heat exchanger Heat exchanger
Sensor of heat exchanger temp Accumulator
.
Compressor
Valve Capillary

5.Operation limits
5.1Cooling operation
Outdoor unit air temp.℃DB
45
8
40
35
30
25
20
10 15 20 25 30 35 40
Indoor air temp. ℃DB
Note : The chart is the result from the continuous operation under constant air temperature
conditions. However, excludes the initial pull-down stage.
5.2Heating operation
Indoor air temp. ℃DB
30
25
20
15
10
5
DRY COOLING
-5 5 15 25
Outdoor unit air temp.℃DB
Note : The chart is the result from the continuous operation under constant air
temperature conditions. However, excludes the initial pull-down stage.

6. Wiring diagram
Model: 42HQE022N/ 38YE022
A1 A2
9