Friedrich MR18C3E User manual

SPLIT TYPE
ROOM AIR CONDITIONER
WALL MOUNTED type
Reciprocating Compressor Models
Indoor unit Outdoor unit
MW18C3E MR18C3E
MW18Y3E MR18Y3E
MW24C3E MR24C3E
MW24Y3E MR24Y3E
MW30C3E MR30C3E
Rotary Compressor Models
Indoor unit Outdoor unit
MW18C3E MR18C3E-A
MW18Y3E MR18Y3E-A
MW24C3E MR24C3E-A
MW24Y3E MR24Y3E-A
CONTENTS
SPECIFICATIONS
OUTLINE AND DIMENSIONS
REFRIGERANT SYSTEM DIAGRAM
CIRCUIT DIAGRAM
INDOOR PRINTED CIRCUIT BOARD CIRCUIT DIAGRAM
ERROR DISPLAY
DISASSEMBLY ILLUSTRATION
PARTS LIST
1
3
4
9
14
17
18
35

2003.06.17 - 2 -
SPECIFICATIONS
RECIPROCATING COMPRESSOR MODELS
TYPE COOL COOL & HEAT COOL COOL & HEAT COOL
INDOOR UNIT MW18C3E MW18Y3E MW24C3E MW24Y3E MW30C3E
OUTDOOR UNIT MR18C3E MR18Y3E MR24C3E M224Y3E MR30C3E
COOLI NG CAPACITY (BTU / h) 18,000 -17,000 17,500 - 16,500 23,000 - 22,500 23,000 - 22,500 29,500 - 28,700
HEATING CAPACITY (BTU / h) ----- 18,000 - 17500 ----- 23,500 - 22,500 -----
ELECTRICAL DATA
POWER SOURCE (V) 230 / 208
FREQUENCY (Hz) 60
COOLING 7.6 - 8.2 7.8 - 8.5 10.0 - 10.8 9.9 - 10.7 15.0 - 16.0
RUNNING CURRENT (A)
HEATI NG ----- 7.2 - 7.5 ----- 8.9 - 9.7 -----
COOLING 1.70 - 1.65 1.75 - 1.71 2.20 - 2.15 2.23 - 2.19 3.15 - 3.05
INPUT WATTS (kW)
HEATI NG ----- 1.58 - 1.53 ----- 2.02 - 1.98 -----
COOLING 10.6 - 10.3 10.0 - 9.65 10.5 - 10.5 10.3 - 10.3 9.37 - 9.41
E.E.R. (BTU / h.W)
HEATI NG ----- 11.3 - 11.4 ----- 11.6 - 11.4 -----
MOISTURE REMOVAL ( / hr) 2.0 1.8 2.7 2.7 4.3
3
AIR CIRCULATION - Hi (m / hr) 800 800 1,100 1,100 1,100
COMPRESSOR
TYPE Hermetic type, Permanent split condenser, 2 poles, Single phase, Induction motor, Recipro
CODE H25B18QABCA H25B18QABCA H25B24QABCA H25B24QABCA H25B35QABCA
REFRIGERANT R-22 (g) 1,700 2,250 2,200 2,350 1,900
FAN MOTOR
POWER SOURCE
(V) 230 / 208
TYPE (r.p.m.) MFA-18FPH MFA-18FPH MFA-30FPH MFA-30FPH MFA-18FPH
HI-SPEED (r.p.m.) 960 - 870 960 - 870 1,260 - 1,160 1,260 - 1,160 1,260 - 1,160
MED-SPEED (r.p.m.) 840 - 750 840 - 750 1,130 - 1,030 1,130 - 1,030 1,130 - 1,030
INDOOR UNIT
LO-SPEED (r.p.m.) 720 - 580 720 - 580 990 - 870 990 - 870 990 - 870
TYPE MFB-24FP MFB-24FP MFB-24FP MFB-24FP MFB-30BP
OUTDOOR UNIT (r.p.m.) 735 735 735 735 790
DIMENSIONS
HEIGHT inch (mm) 12 - 19/32" (320) 12 - 19/32" (320) 12 - 19/32" (320) 12 - 19/32" (320) 12 - 19/32" (320)
INDOOR UNIT WIDTH inch (mm) 49 -7/32" (1,250) 49 -7/32" (1,250) 49 -7/32" (1,250) 49 -7/32" (1,250) 49 -7/32" (1,250)
DEPTH inch (mm) 7 - 11/16" (195) 7 - 11/16" (195) 7 - 11/16" (195) 7 - 11/16" (195) 7 - 11/16" (195)
HEIGHT inch (mm) 25 - 1/8" (643) 25 - 1/8" (643) 25 - 1/8" (643) 25 - 1/8" (643) 45 - 11/32" (1,152)
OUTDOOR UNIT WIDTH inch (mm) 33 - 1/32" (840) 33 - 1/32" (840) 33 - 1/32" (840) 33 - 1/32" (840) 37 - 1/32" (940)
DEPTH inch (mm) 13 - 1/4" (336) 13 - 1/4" (336) 13 - 1/4" (336) 13 - 1/4" (336) 14 - 9/16" (370)
WEIGHTS
INDOOR UNIT 55 / 40 (25 / 18) 55 / 40 (25 / 18) 55 / 40 (25 / 18) 55 / 40 (25 /18) 55 / 40 (25 / 18)
OUTDOOR UNIT GROSS / NET lbs (kg) 163 / 145 (74 / 66) 165 / 147 (75 / 67) 165 / 147 (75 / 67) 167 / 150 (76 / 68) 238 / 207 (108 / 94)
REFRIGERANT CHARGING
PIPE LENGTH 25 ft. (7.5 m) 33 ft. (10 m) 49 ft. (15 m) 66 ft. (20 m) 83 ft. (25 m) 98 ft. (30 m)
1
,
700
g
1
,
730
g
1
,
790
g
1
,
850
g
-----
----
-
MR18C3E (60.0 oz.) (61.1 oz.) (63.2 oz.) (65.3 oz.)
FULL 2,250 g 2,335 g 2,505 g 2,675 g
MR18Y3E (79.4 oz.) (82.4 oz.) (88.4 oz.) (94.4 oz.) ----- -----
CHARGE 2
,
200
g
2
,
230
g
2
,
290
g
2
,
350
g
----- -----
AMOUNT
MR24C3E
(
77.6 oz.
)
(
78.7 oz.
)
(
80.8 oz.
)
(
82.9 oz.
)
2,350
g
2,435
g
2,605
g
2,775
g
MR24Y3E (82.9 oz.) (85.9 oz.) (91.9 oz.) (97.9 oz.) ----- -----
1,900 g 1,943 g 2,028 g 2,113 g 2,198 g 2,283 g
MR30C3E (67.0 oz.) (68.5 oz.) (71.5 oz.) (74.5 oz.) (77.5 oz.) (80.5 oz.)
Note : Whenever 7.5 m is exceeded, and/or when using a line set length other than those found in the table, charge with additional refrigerant as follows:
34 g (1.20 oz.) / 3.3 ft. (1 m) for 18Y, 24Y Models, 14.4 g (0.51 oz.) / 3.3 ft (1 m) for 18C Model, 12 g (0.42 oz.) / 3.3 ft (1 m) for 24C Model, and 17 g (0.60 oz.) /
3.3 ft (1 m) for 30C Model.

2003.06.17 - 3 -
SPECIFICATIONS
ROTARY COMPRESSOR MODELS
TYPE COOL COOL & HEAT COOL COOL & HEAT
INDOOR UNIT MW18C3E MW18Y3E MW24C3E MW24Y3E
OUTDOOR UNIT MR18C3E-A MR18Y3E-A MR24C3E-A MR24Y3E-A
COOLI NG CAPACITY (BTU / h) 18,000 -17,000 17,500 - 16,500 23,000 - 22,500 23,000 - 22,500
HEATING CAPACITY (BTU / h) ----- 18,000 - 17500 ----- 23,500 - 22,500
ELECTRICAL DATA
POWER SOURCE (V) 230 / 208
FREQUENCY (Hz)
60
COOLING 8.3 - 9.1 8.2 - 8.9 10.7 - 11.7 10.5- 11.3
RUNNING CURRENT (A)
HEATI NG ----- 8.0 - 8.5 ----- 9.9- 10.4
COOLING 1.91 - 1.87 1.89 - 1.84 2.41 - 2.40 2.34 - 2.29
INPUT WATTS (kW)
HEATI NG ----- 1.82 - 1.77 ----- 2.18- 2.13
COOLING 9.4 - 9.0 9.26 - 8.97 10.7 - 11.7 9.82 - 9.83
E.E.R. (BTU / h.W)
HEATI NG ----- 9.89 - 9.89 ----- 10.8- 10.6
MOISTURE REMOVAL ( / hr) 2.0 1.8 2.7 2.7
3
AIR CIRCULATION - Hi (m / hr) 800 800 1,000 1,000
COMPRESSOR
TYPE Hermetic type, Permanent split condenser, 2 poles, Single phase, Induction motor
CODE PH28NSGT PH28NSGT PH33NTJT PH33NTJT
REFRIGERANT R-22 (g) 1,700 1,900 2,000 2,200
FAN MOTOR
POWER SOURCE
(V) 230 / 208
TYPE (r.p.m.) MFA-18FPHT MFA-18FPHT MFA-30FPHT MFA-30FPHT
HI-SPEED (r.p.m.) 960 - 870 960 - 870 1,260 - 1,160 1,260 - 1,160
MED-SPEED (r.p.m.) 840 - 750 840 - 750 1,130 - 1,030 1,130 - 1,030
INDOOR UNIT
LO-SPEED (r.p.m.) 720 - 580 720 - 580 990 - 870 990 - 870
TYPE MFB-24FP MFB-24FP MFB-24FP MFB-24FP
OUTDOOR UNIT (r.p.m.) 735 735 735 735
DIMENSIONS
HEIGHT inch (mm) 12 - 19/32" (320) 12 - 19/32" (320) 12 - 19/32" (320) 12 - 19/32" (320)
INDOOR UNIT WIDTH inch (mm) 49 -7/32" (1,250) 49 -7/32" (1,250) 49 -7/32" (1,250) 49 -7/32" (1,250)
DEPTH inch (mm) 7 - 11/16" (195) 7 - 11/16" (195) 7 - 11/16" (195) 7 - 11/16" (195)
HEIGHT inch (mm) 25 - 1/8" (643) 25 - 1/8" (643) 25 - 1/8" (643) 25 - 1/8" (643)
OUTDOOR UNIT WIDTH inch (mm) 33 - 1/32" (840) 33 - 1/32" (840) 33 - 1/32" (840) 33 - 1/32" (840)
DEPTH inch (mm) 13 - 1/4" (336) 13 - 1/4" (336) 13 - 1/4" (336) 13 - 1/4" (336)
WEIGHTS
INDOOR UNIT 40 (25 / 55 / 40 (25 / (25 / 18) (25 / 18)
GROSS / NET lbs (kg) 55 / 18) 18) 55 / 40 55 /40
OUTDOOR UNIT 163 / 145 (74 / 66) 165 / 147 (75 / 67) 165 /147 (75 / 67) 167 /150 (76 / 68)
REFRIGERANT CHARGING
PIPE LENGTH 25 ft. (7.5 m) 33 ft. (10 m) 49 ft. (15 m) 66 ft. (20 m)
1,700 g 1,736 g 1,808 g 1,880 g
MR18C3E-A (60.0 oz.) (61.2 oz.) (63.7 oz.) (66.3 oz.)
FULL 1,900
g
1,985
g
2,155
g
2,325
g
MR18Y3E-A (67.0 oz.) (70.0 oz.) (76.0 oz.) (82.0 oz.)
CHARGE 2,000 g 2,030 g 2,060 g 2,120 g
AMOUNT MR24C3E-A
(
67.0 oz.
)
(
71.6 oz.
)
(
72.7 oz.
)
(
74.8 oz.
)
2,200 g 2,285 g 2,455 g 2,625 g
MR24Y3E-A (77.6 oz.) (80.6 oz.) (86.6 oz.) (92.6 oz.)
Note : Whenever 7.5 m is exceeded, and/or when using a line set length other than those found in the table, charge with additional refrigerant as follows:
34 g (1.20 oz.) / 3.3 ft. (1 m) for 18Y, 24Y Models and 14.4 g (0.51 oz.) / 3.3 ft (1 m) for 18C Model and 12 g (0.42 oz.) / 3.3 ft (1 m) for 24C Model.

2003.06.18 - 3 -
OUTLINE AND DIMENSIONS
Models : ASU18C1, ASU18R1
ASU24C1, ASU24R1
ASU30C1
Unit : inch (mm)
M
ode
l
s
: A
OU
1
8C
1
,
A
OU
1
8
R1
,
A
OU
1
8
R1
A
M
ode
l : A
OU30C
1
AOU24C1, AOU24R1, AOU24R1
A
14-9/16"(336)
Models: MW18C3E, MW18Y3E
MW24C3E, MW24Y3E
MW30C3E
Models: MR18C3E, MR18C3E-A
MR18Y3E, MR18Y3E-A
MR24C3E, MR24C3E-A
MR24Y3E, MR24Y3E-A
Model: MR30C3E

REFRIGERANT SYSTEM DIAGRAM
2003.08.27
Models: MW18Y3E
/
MR18Y3E
Models: MW18C3E
/
MR18C3E

2003.08.27 - 5 -
Models : ASU24R1 / AOU24R1
Models: MW24Y3E / MR24Y3E
Models: MW24C3E / MR24C3E

2003.08.27 - 6 -
Model: MW30C3E / MR30C3E

2003.08.27 - 7 -
Models : MW18C3E / MR18C3E-A
Models : MW18Y3E/ MR18Y3E-A
Cooling
Heating
: Flare coupling

2003.08.27 - 8 -
Models : MW24C3E / MR24C3E-A
Models : MW24Y3E / MR24Y3E-A
Cooling
Heating
: Flare coupling

Models: MW18C3E / MR18C3E
MW24C3E / MR24C3E

Models: MW18Y3E / MR18Y3E
MW24Y3E / MR24Y3E

Models: MW30C3E / MR30C3E

Models: MW18C3E
/
MR18C3E-A
MW24C3E / MR24C3E-A

Models: MW18Y3E, MR18Y3E-A
MW24Y3E, MR24Y3E-A

Models: MW18C3E / MR18C3E, MR18C3E-
A
MW24C3E / MR24C3E, MR24C3E-A

Models: MW18Y3E / MR18Y3E, MR18Y3E-
A
MW24Y3E / MR24Y3E, MR24Y3E-A

Models: MW30C3E / MR30C3E

17
ERROR DISPLAY
Operation can be checked by lighting and flashing of the
display section OPERATION and TIMER lamps. Perform
judgment in accordance with the following.
Test running
When the air conditioner is run by pressing the remote control
unit test run button, the OPERATION and TIMER lamps flash
slowly at the same time.
Error
The OPERATION and TIMER lamps operate as follows (Table)
according to the error contents.
Table
Error display Error contents
0.5 sec 0.5 sec
5sec
0.1 se
sec
ON
OPERATION
LAMP
OFF
ON
TIMER
LAMP
O
FF
Two quick
flashes
repeated
0.1 sec ON/OFF
repeated
Room temperature
thermistor abnormal
temperature
detected
0.5 sec 0.5
sec
OF
F
5
01
se
sec
ON
OPERATION
LAMP
ON
TIMER
LAMP
O
FF
0
Three quick
flashes
repeated
0.1 sec
ON/OFF
repeated
Piping thermistor
abnormal
temperature
detected
2003.06.18 - 17 -

Models: MW18C3E
MW18Y3E
MW24C3E
MW24Y3E
MW30C3E
MW24C3E, MW24Y3E, MW30C3E

Models: MW18C3E
MW18Y3E
MW24C3E
MW24Y3E
MW30C3E