ultima ultra multi-temp ultra xl extra optima with standard micro prior ...

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3. Press the FUNCTION CHANGE key until AUTOOP or MAN OP appears on the display.a. If AUTO OP appears:(1) Press the ENTER key.(2) Press the UP or DOWN arrow key to makeMAN OP appear on the display.(3) Press the ENTER key. The unit is in MANUALSTART mode.b. If MAN OP appears: the unit is in MANUALSTART mode.4. Use the Manual Glow/Crank switch to start the unitrefer to Table 2-1.NOTEOnce the unit is programmed for Man OP, theAUTO S/S --- CONTINUOUS key can be usedto toggle between Auto Start/Stop andContinuous RunTable 2-1. Manual Glow TimeGlow Time inAmbient Temperature Seconds ForTV DILess than 32_F (0_C) 15 5533_F to50_F (1_C to10_C) 10 4051_F to77_F (11_C to25_C) 5 25Greater than 78_F (26_C) 0 10b. Stopping InstructionsPlace RUN-STOP switch in the STOP position to stopunit.2.3 STARTING AND STOPPING INSTRUCTIONS -STANDBY MOTORWARNINGMake sure the power plugs are clean and dry beforeconnecting to any power receptacle.Beware of unannounced starting of fans andV-belts caused by thermostatic cycling of unitduring standby operation.a. Starting Instructions1. Place the Run/Stop Switch in the STOP (0) position.2. Plug in the power plug.3. Place the Engine/Standby Switch in the STANDBYposition.4. Place the Run/Stop Switch in the RUN (I) position.Units with buzzer will sound for 5 seconds beforestarting.5. Check for proper motor rotation. Condenser airmust be drawn into unit. To reverse rotation, stopunit, disconnect power cord and change polarity ofplug.b. Stopping InstructionsWARNINGWhen changing from standby operation, firstturn the unit OFF, turn OFF main power andremove power plug.1. Place the Run/Stop Switch in the STOP (0) position.2.4 CONTROL CIRCUIT OPERATION -ENGINE DRIVE2.4.1 IntroductionNOTEThe schematic in this manual has mapcoordinates added to the margins. For example,to locate the ammeter (A) on the schematic, itwould follow the component designation by thedesignation (I2). This would indicate that it isclosest to lines I and 2 on the schematic. Theselocations have been added to the legend.The controller boards shown on the electrical schematic(Figure 5-1) that interface with unit components are theanalog interface or processor board on the left and therelay module on the right.Connections to these boards are made through 3multiple-pin plug connectors HC, HC2, & MP. Theaddress system (example HCD2-MPW2) indicates a wirebetween plug HC, pin D2 and microprocessor MP & pinW2.The processor board connections are mainly inputs andoutputs for control switches, temperature sensors, safety,and auto start functions that control the operation of theunit. The processor board also controls the operation ofthe relay board through plug connections.The relay module, which contains plug-ininterchangeable relays provides the microprocessor witha means for switching the unit components to achieve adesired operating mode.2.4.2 CoolingThere are two control ranges, Frozen and Perishable. TheFrozen range is active with set points at or below +10_F( --- 12_C) and the Perishable range is active at set pointsabove +10_F ( --- 12_C).The controller automatically selects the mode(s)necessary to maintain box temperature at set point. ThemodesareshowninTable2-2.For units with UltraFresh 2 refer to section 1.12.If the unit is in high speed loaded cool, themicroprocessorwillpullterminalN3lowtoenergizethespeed relay. A set of normally open contacts (SR) close toenergize the speed control solenoid (SCS). The enginewill be in high speed.When the unit is running in high speed loaded cool andwith the evaporator coil temperature below 40_F (4.4_C)to close at least one defrost termination thermostat, apre-trip may be initiated by depressing the PRETRIP62-024612-2
key. The operator now may verify the pre-trip sequence.(Refer to Section 1.10.8)As the trailer temperature falls toward set point, themicroprocessor will place the unit in low speed loadedcool. The temperature at which this occurs is not fixed butdepends upon the rate at which the trailer temperature isapproaching set point.The speed relay (SR) de-energizes to open the circuit tothe speed control solenoid (SCS). Engine speeddecreases from high speed to low speed.As the trailer temperature falls closer to set point, thecontroller will shift the operation from low speed loadedcool to low speed unloaded cool to further reduce coolingcapacity. To do this, the microprocessor will pullterminals X2 or X2 & X3 low, completing the groundpath for the unloader relays (UFR & URR). The coilsenergizes to close the UFR & URR contacts. One or bothunloaders (UF and UR) may energize to unload thecompressor (Refer to Section 1.9).For setpoints above 10_F ( --- 12_C) and with decreasingtemperature, the unit will shift to low speed unloadedheat.For units with UltraFreeze refer to section 1.13.For units without UltraFreeze setpoints below 10_F( --- 12_C) heating is locked out. Therefore, it is possiblefor the box temperature to fall below setpoint in thefrozen range.Unit will remain in various stages of heating until the boxtemperature increases enough to place the unit in the lowspeed unloaded cool mode. As the box temperatureincreases, the unit will shift to low speed loaded cool , andthen to high speed cool mode (speed relay energizes).2.4.3 HeatingNOTES1. SV-3 will open after a 60 second delay, if theengine is in high speed and the differencebetween ambient and discharge temperaturesexceeds 100_F (55.5_C). If the differencebetween ambient and discharge temperaturesgoes below 50_F (27.8_C) SV-3 will close.2. SV-3 on Ultima’s, will not open when the ambienttemperature exceeds 80_F (26.7_C).3. Whenever the unit shifts to heat or defrost, HR1and HR2 energize simultaneously. Whenswitching from heat (or defrost) to cool, HR1de-energizes 2 seconds before HR2. This allowstime for SV-1 to open and clear the condenser ofliquid before SV4 closes. This will eliminate anyhigh pressure buildup which could occur. Duringthis time, only on the remote light bar, the heatand cool lights will be on together. The heat andcool display on the control panel changeimmediately.Refer to section 1.17 for description on heating cycle.For units with UltraFreeze refer to section 1.13.The unit will only heat when the controller is set above+10_F ( --- 12_C) as the heat relays are electronicallylocked out with set points at or below +10_F ( --- 12_C).The controller automatically selects the mode(s)necessary to maintain box temperature at set point. Theheating modes are as follows with descendingtemperatures:(a) Low Speed Unloaded Heating, (b) Low SpeedLoaded Heating, (c) High Speed Loaded HeatingThe controller will shift the unit into low speed unloadedheat when the trailer temperature falls below set point(compressor in four cylinder heating). Themicroprocessor pulls terminals N1, X1 and X2 low tocomplete the ground paths for the heat relays (HR1 andHR2) and unloader front relay (UFR). When theserelays energize, several things happen. This opens the(N.C.) contacts to the cool light and solenoid valve(SV2). SV2 now operates in conjunction with the headpressure control switch (HP2). (Refer to section 1.17)Also, HR1 closes a set of normally open contacts toenergize solenoid valve SV1 to close the condenser outletline.When the unloader front relay (UFR) energizes, a set ofN.O. contacts (UFR) close to energize the compressorfront unloader (UF). Compressor will be in four cylinderheating.Energizing HR2 closes two sets of N.O. contacts.Solenoid SV4 energizes and opens to allow hotrefrigerant vapor to enter the evaporator (section 1.17).The other set of HR2 contacts supply power to the heatlight on light bar.If more heating capacity is required, the unit will shift tolow speed loaded heating. The microprocessor will breakthe ground path to de-energize the front unloader relay,which in turn, de-energizes the compressor unloaders(compressor shifts from four cylinder to six cylinderoperation).NOTEHigh speed heat is locked out for 5 minutesafter switching from cool to heat.When maximum heating capacity is required, the unitwill shift to high speed loaded heat. The microprocessorenergizes the HR1, HR2, and speed relay (SR) coils.Terminals N1, X1 and N3 will be pulled low. The onlychange from the low speed loaded heat mode is that thespeed relay is now energized. SR contacts close toenergize the speed control solenoid (SCS). The enginewill be in high speed.2.4.4 DefrostRefer to sections 1.10.10 and 1.17 for the heat and defrostcycle.NOTEThe unit will be in high speed in the defrostmode.2-3 62-02461
Page 7: LIST OF ILLUSTRATIONS (CONT’D)Fig
Page 10 and 11: 9SECTION 1DESCRIPTION1.1 INTRODUCTI
Page 12 and 13: 91123234564758961. Condenser Pressu
Page 14 and 15: 91. Condenser Pressure ControlSolen
Page 16 and 17: 91. King Valve2. Hot Gas Solenoid V
Page 18 and 19: 9165341. Evaporator Fan2. Expansion
Page 20 and 21: 943112 2200V/50hz230V/60hz380V/50hz
Page 22 and 23: MODELUltima, Phoenix Ultra,Ultra XL
Page 24 and 25: . Perishable Cooling Unloader Contr
Page 26 and 27: 1.9.4 Hot Gas Bypass Unloadera. Maj
Page 28 and 29: 91.10 MICROPROCESSOR CONTROLLERCOOL
Page 30: Manual Glow OverrideThe auto start
Page 33 and 34: 1.1.1 HEAT/COOL MODE1.10.7ALARM DIS
Page 35 and 36: 1.1.1 HEAT/COOL MODE1.10.10 DEFROST
Page 37 and 38: 1.1.1 HEAT/COOL MODEIf the battery
Page 39 and 40: 1.1.1 HEAT/COOL MODEFALLINGTEMPERAT
Page 41 and 42: 1.1.1 HEAT/COOL MODE1.14.2DataLink
Page 43 and 44: 1.1.1 HEAT/COOL MODE1.15 BATTERY CH
Page 46 and 47: 1.17 REFRIGERANT CIRCUIT DURINGHEAT
Page 48 and 49: 9EXTERNAL EQUALIZEREXPANSIONVALVEBU
Page 52 and 53: Thedefrostmodemaybeinitiatedbythree
Page 54 and 55: ModeTable 2-2. Relay OperationDEPer
Page 56 and 57: INDICATION/TROUBLEPOSSIBLE CAUSESRE
Page 58 and 59: INDICATION/TROUBLE3.3.5Defrost Cycl
Page 60 and 61: INDICATION/TROUBLEPOSSIBLE CAUSESRE
Page 62 and 63: . Every 2000 Hour Maintenance --- N
Page 64 and 65: 4.3 ENGINE SERVICE AND COMPONENTS4.
Page 66 and 67: 4.3.5 Engine Crankcase BreatherThe
Page 68 and 69: 421. Evaporator/Condenser Fan V-Bel
Page 70 and 71: 4.5 SERVICING STANDBY CLUTCH (NDM)T
Page 72 and 73: 4.7 PUMPING THE UNIT DOWN ORREMOVIN
Page 74: . Run the unit in cooling for ten m
Page 77 and 78: . Solenoid Coil ReplacementNOTEThe
Page 79 and 80: 4.17 CHECKING AND REPLACING HIGHPRE
Page 81 and 82: 10. Dehydrate and evacuate the syst
Page 83 and 84: 4.23 REPLACING THE CONDENSER/ EVAPO
Page 85 and 86: 10. Install clutch on fan shaft ass
Page 87 and 88: To check Phase Sequence Module:a. V
Page 89 and 90: 4.31 CONTROLLER SENSOR CHECKOUTAn a
Page 91 and 92: M8 x 20 mm lg(6 Req’d) 18 ft-lbs
Page 93 and 94: Table 4-6. R-404A Temperature---Pre
Page 95 and 96: Figure 5-1. NDA-94A Electrical Sche
Page 97 and 98: Figure 5-2. NDA-94A & NDA-94B Elect
Page 99 and 100: Figure 5-3. NDA-94 Electrical Schem
Page 101 and 102:
Figure 5-4. NDM-94A EURO Electrical
Page 103 and 104:
Figure 5-5. NDM-94 (EURO) Electrica
Page 105 and 106:
Figure 5-6. NDM-94A Electrical Sche
Page 107 and 108:
Figure 5-7. NDM-94 Electrical Schem
Page 109 and 110:
Figure 5-8. NDM-94A --- 230v Phase
Page 111 and 112:
Figure 5-9. NDM-94 230v Phase Rever
Page 113 and 114:
Figure 5-10. NDM-94A --- 380v Phase
Page 115 and 116:
Figure 5-11. NDM-94 380v Phase Reve
Page 117 and 118:
Figure 5-12. NDA, NDM and NDX Elect
Page 119 and 120:
Figure 5-13. NDA, NDM and NDX Elect
Page 121 and 122:
SECTION 6MULTI-TEMP OPERATION AND S
Page 123 and 124:
6.5 MULTI-TEMP REFRIGERANT CIRCUITT
Page 125 and 126:
energized at 2.5_C above setpoint.
Page 127 and 128:
6.13 5KW GENERATOR MAINTENANCEThe 5
Page 129 and 130:
Table 6-4. 2 Compartment Reversible
Page 131 and 132:
Table 6-5. 3 Compartment Reversible
Page 133 and 134:
6-13 62---02461Figure 6-8. Electric
Page 135 and 136:
6-15 62---02461Figure 6-9. Electric
Page 137 and 138:
6-17 62---02461Figure 6-10. Electri
Page 139 and 140:
6-19 62---02461Figure 6-11. Electri
Page 141 and 142:
6-21 62---02461Figure 6-12 Electric
Page 143 and 144:
6-23 62---02461Figure 6-13 Electric
Page 145 and 146:
IndexIRemote Evaporator, 6-5Introdu
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