Friedrich DH30 Service Manual
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Friedrich DH30 Service Manual

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MODELS:
DH30
DH40
DH50
DeHumSrv (03/02)

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Summary of Contents for Friedrich DH30

  • Page 1 MODELS: DH30 DH40 DH50 DeHumSrv (03/02)

  • Page 2: Table Of Contents

    CONTENTS INTRODUCTION PREFACE SAFETY PRECAUTIONS ......................FEATURES ..........................DIMENSIONS ..........................SPECIFICATIONS ........................CONTROL ..........................HOW TO OPERATE DEHUMIDIFIER ..................HOW DOES THE DEHUMIDIFIER WORK? ................LOCATION FOR THE DEHUMIDIFIER ..................MICROSWITCH .......................... AUTO DEFROST ........................HUMIDITY CONTROLLER ......................DRIER ............................CIRCUIT DIAGRAM ................

  • Page 3: Introduction

    If you perform service on equipment, you must assume responsibility for any bodily injury or property damage which may result to you or others. Friedrich Air Conditioning Company will not be responsible for any injury or property damage arising from improper...

  • Page 4: Preface

    PREFACE This Service Manual provides various service information, containing the mechanical and electrical parts etc. This dehu- midifier was manufactured and assembled under the strict quality control system. The refrigerant is charged at the factory. Be sure to read the safety precaution prior to servicing the unit. SAFETY PRECAUTIONS •...

  • Page 5: Specifications

    SPECIFICATIONS -__-_ MODELS DH3011B DH4010E DH5010E ITEMS CAPACITY (Pint/Day) POWER SUPPLY (Phase, V, Hz) 1{], 115V, 60Hz REFRIGERANT R 134a REFRIGERANT CHARGE, oz(g) 4.76(135) 5.11 (145) 7.05(200) OPEN : 28.4°F(-2°C +_0.5) THERMISTOR CLOSE : 53.6°F(12°C_+0.5) CONTROL RANGE : 20% - 80% RH HUMIDITY SENSOR NORMAL SETTING : 40% RH P.T.C.

  • Page 6: Control

    CONTROL Humidity Control When first using the dehumidifier, we recommended that you run the unit with the humidistat control set to MAX for the first three or four days until excess moisture and dampness odors are gone. After that you can select the humidistat position that will best suit local conditions.

  • Page 7: Microswitch

    MICROSWlTCH The microswitch assembly, which is located on the barrier inside the unit, automatically turns the dehumidifier off when the bucket is full. (NOTE: the Auto Shut-Off light will illuminate to indicate the bucket should be emptied). When the bucket is reinstalled, the unit will resume dehumidification.

  • Page 8: Disassembly Instructions

    DISASSEMBLY INSTRUCTIONS BUCKET AND AIR FILTER Turn the Humidity Control off. Disconnect the power supply. Remove the bucket. (See Figure 5.) Flex the filter at the lower right corner and take it off. (See Figure 5.) Figure 5 Disconnect Power Supply FRONT GRILLE Push...

  • Page 9: Control Parts

    CONTROL PARTS ROTARY, SWITCH / SWITCH ASSEMBLY, ROTARY / PWB (PCB) ASSEMBLY, DISPLAY / PWB (PCB), ASSEMBLY, MAIN Remove the screw in the front and upper side of the control box and then unfold the two sides of the control box. Disconnect the housing and all the leads to the rotary switch, switch assembly rotary and PWB (PCB) assembly, DISPLAY from PWB (PCB)

  • Page 10: Fan And Motor

    FAN AND MOTOR 1. Remove the fan mounting nut and remove the fan. 2. Remove the two screws (upper left and right) that fasten the condenser. 3. Carefully lift the condenser coil and rotate it about 45 degree clockwise. (See Figure 13.) 4.

  • Page 11: Condenser, Evaporator And Capillary Tube (Heat Exchange Assembly)

    REMOVING THE CONDENSER, EVAPORATOR AND CAPILLARY TUBE (HEAT EXCHANGE ASSEMBLY) Remove the insulation on the condenser assembly. Pierce the pinch-off tube to recover the refrigerant according to EPA requirements. After recovering the refrigerant completely, remove the two screws between the shroud and condenser. (See Figure 16.) Lift and turn the condenser 45 degree clockwise.

  • Page 12: How To Replace Refrigeration System

    HOW TO REPLACE REFRIGERATION SYSTEM 1. Recover the refrigerant in accordance with EPA 7. Recharge as follows : requirements. 1 ) Sealed systems are charged from the high-side. If the total charge cannot be put in the high-side, the 2. Remove the desired component, and unbraze the pinch- balance should be introduced thorough the suction off tubes.
  • Page 13 Equipment needed: Vacuum pump, charging cylinder, manifold gauge, brazing equipment; pinch-off tool capable of making a vapor-proof seal, leak detector, tubing cutter; hand tools to remove components, and service valve. EVAPORATOR ASSEMBLY EVAPORATOR ASSEMBLY (LOW PRESSURE SIDE) (LOW PRESSURE SIDE) CONDENSER ASSEMBLY CONDENSER ASSEMBLY (HIGH PRESSURE SIDE)
  • Page 14 TROUBLESHOOTING GUIDE. _.[T ifier is unplugged. Make sure lhe dehumidifier's plug is .._ !'e dehumi'd_......P U2h e._J_c° m.p.!e!t lYt_nt° ! he °ut!et: ..... _The fuse is blown/circuil Check the house fuse/circuit breaker ......... the breaker.: ........I b!eake[ s t[pped.
  • Page 15 REMEDY CONDITION CAUSE 1. Dehumidifier does net start. (Both No power Check power supply at outlet. Correct if none. compressor and fan motor do not operate.) Poor plug contact at cutlet. Install plug properly or replace it. Bucket is full. If Auto Shut Off lights, empty the bucket and replace properly.
  • Page 16 CONDITION CAUSE REMEDY 5, Noisyoperating If cracked, out of balance, or partially missing, replace it Tube hits frame. Adjust tubing routine carefully. Fan blade bits frame Check Motor Mount. If loose, tighten it. Internal compressor nobse. Replace compressor. Loose set screws Tighten them.

  • Page 17: Circuit Diagram

    CIRCUIT DIAGRAM • MODEL: DH30 • MODEL: DH40/DH50 SWITCH MAIN PCB ROTARY HUMIDITY CONTROL S,'W BUCKET WH{BL) (N 1 FULL BUCKET CN-BEN S#,N HUiVl_DITY O.L.P FUSE 250V T2A BK(BR)(L} THERMISTOR WIRING DIAGRAM...

  • Page 18: Exploded View - Introduction

    5. EXPLODED VIEW - INTRODUCTION • MODEL: DH30...
  • Page 19 • MODEL: DH40...
  • Page 20 • MODEL: DH50...

  • Page 21: Replacement Parts List

    6. REPLACEMENT PARTS LIST • MODEL: DH30 LOCATION REMARK DESCRIPTION FRIEDRICH PART 130411 67400104 BASE ASSEMBLY, WELD (SINGLE) 130900 CABINET 67400105 135312 67400106 GRILLE ASSEMBLY_ FRONT 147910 BARRIER ASSEMBLY 67400108 148380 67400110 TANK I BUCKET 149410 KNOB ASSEMBLY 67400111 152302...
  • Page 22 • MODEL: DH40 LOCATION REMARK DESCRIPTION FRIEDRICH PART 130411 67400104 BASE ASSEMBLY I WELD (SINGLE) 130900 CABINET 67400105 135312 67400106 GRILLE ASSEMBLY, FRONT 147910 BARRIER ASSEMBLY 67400108 148380 67400110 TANK_ BUCKET 149410 KNOB ASSEMBLY 67400111 152302 67400126 FILTER (MECH)t AIR...

  • Page 23: Power Cord Assembly

    • MODEL: DH50. LOCATION REMARK DESCRIPTION FRIEDRICH PART 130411 67400103 BASE ASSEMBLY, WELD (SINGLE) 130900 CABINET 67400105 135312 FRONT GRILLE ASSEMBLY 67400106 147910 BARRIER ASSEMBLY 67400108 148380 TANK, BUCKET 67400110 149410 KNOB ASSEMBLY 67400111 152302 67400126 AIR FILTER (MECH) 162615...
  • Page 24 Certified Parts... FRIEDRICH AIR CONDITIONING ,, Pos=t O ffice Box 1540 ,, San Antonio, Texas 78295-1540 • 4200 N. Pan Am Expressway • San Antonio, lexas 78218-5212 (210) 357-4400 = FAX (210) 357-4480 Visit us on the Intemet at www.fdedrieh.eom Printed in the U,SA.

This manual is also suitable for:

Dh40Dh50

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