Controls, Start-Up, Operation, Service and ... - Climayoreo

More documents

Recommendations

Info

Table 72 — Humidi-MiZer ® Service Analysis PROBLEM CAUSE REMEDY Circuit B compressors unavailable Check alarm history for general cooling mode operation problems. See "Cooling Troubleshooting," Table 71. Check for Circuit B compressors locked out. General Cooling Mode problem See "Cooling Troubleshooting," Table 71. Humidi-MiZer relative humidity sensor Check that a relative humidity sensor is connected and that the not functioning - RARH, SPRH, or field installed RH sensor appropriate sensor is configured in the unit software, (ConfigurationDEHUD.SEN). See page 80. Subcooling Mode Will Not Activate Check for 24VDC from CEM (RARH, SPRH). Check 4-20 ma signal from sensor. Humidi-MiZer temperature sensors not functioning - SAT, CCT See "Thermistor Troubleshooting," see page 91. No Dehumidification demand See "No Dehumidification Demand, below. 3-way valve malfunction See "3-Way valve malfunction," below. Unit control software is not configured for Humidi-MiZer system Check that the unit is configured for Humidi-MiZer (ConfigurationDEHUD.SEL). Circuit B compressors unavailabe Check alarm history for general cooling mode operation problems. See "Cooling Troubleshooting," Table 71. Check for Circuit B compressors locked out. Humidi-MiZer relative humidity sensor Check that a relative humidity sensor is connected and that the not functioning - RARH, SPRH, or field installed RH sensor appropriate sensor is configured in the unit software, (ConfigurationDEHUD.SEN). See page 80. Reheat Mode Will Not Activate Check for 24 VDC from CEM (RARH, SPRH). Check 4-20 mA signal from sensor. No Dehumidification demand See "No Dehumidification Demand,” below. 3-way valve malfunction See "3-Way Valve Malfunction." Unit control software is not configured for Humidi-MiZer system Check that the unit is configured for Humidi-MiZer (Configuration DEHUD.SEL). Relative Humidity setpoint is too low - discrete input (Humidistat, Thermidistat, etc.) Check/reduce setting on discrete humidity input device. No Dehumidification Demand Relative Humidity setpoint is too low - RH sensor Check the dehumidification relative humidity trip point (ConfigurationDEHUD.RH.S) Software configuration error for the type of relative humidity sensor being Check that the unit software is configured for the correct relative humidity sensor (ConfigurationDEHUD.SEN). D.SEN = 1: used RARH, 2:SPRH, 3: Discrete Input. See page 80. No humidity signal Check wiring and sensor. No 24V signal to input terminals Check using Service Test mode. Check wiring. Check transformer and circuit breakers. Check RCB relay output. 3-Way Valve Malfunction Solenoid coil burnout Check continuous over-voltage is less than 10%. Check continuous under-voltage is less than 15%. Check for missing coil assembly parts. Replace solenoid coil. Stuck valve Replace valve. Replace filter drier. Humid-MiZer Vent Reheat Set Point is too low Check the Vent Reheat Set Point Selection (Configuration DEHUD.V.CF) and Vent Reheat Setpoint (Configuration DEHU D.V.HT). If used, check the Vent Reheat RAT Offset also (ConfigurationDEHUD.V.RA). See page XX for Humid- Mizer controls set-up Evaporator discharge temperature See "Thermistor Troubleshooting,” page 91. (CCT) or Supply air temperature (SAT) thermistor is reading incorrectly. Check if SAT thermistor is in a location that is measuring stratified air Unit Initiates a Humidi-mizer Reheat Mode, but Supply Air Temperature is Overheating/ Overcooling the Space Valve controlling gas bypass around the condenser is not functioning properly Valve controlling refrigerant flow to the condenser is not functioning properly See "Modulating Valves Not Functioning Properly" See "Modulating Valves Not Functioning Properly" Modulating valves are not calibrated properly Run valve calibration through Service Test Unit control software indicates a Humidi-MiZer Reheat Mode, but the 3way valve is not functioning properly See "3-Way Valve Malfunction" Unit is not sized to meet the load at the Check product data tables or ECAT for rated capacity at current current entering air and outdoor conditions. entering air and outdoor conditions. 92
Transducer Troubleshooting — The electronic control uses 2 suction pressure transducers to measure the suction pressure of circuits A and B. The pressure/voltage characteristics of these transducers are in shown in Tables 80 and 81. The accuracy of these transducers can be verified by connecting an accurate pressure gage to the second refrigerant port in the suction line. Forcing Inputs and Outputs — Many of variables may be forced both from the CCN and directly at the local display. This can be useful during diagnostic testing and also during operation, typically as part of an advanced third party control scheme. Please see Appendix A and B. NOTE: In the case of a power reset, any force levels in effect at the time of the power reset will be cleared. CONTROL LEVEL FORCING — If any of the following points are forced with a priority level of 7 (consult CCN literature for a description of priority levels), the software clears the force from the point if it has not been written to or forced again within the timeout periods defined below: Table 72 — Humidi-MiZer Service Analysis (cont) PROBLEM CAUSE REMEDY Unit Initiates a Humidi-MiZer Dehumidification Mode, but Supply Air Temperature is Overheating/Overcooling the Space Low Sensible Capacity in Normal Cooling Mode Modulating Valves Not Functioning Properly Supply air setpoint for cooling is too high/low Evaporator discharge temperature (CCT) or Supply air temperature (SAT) thermistor is reading incorrectly. Valve controlling gas bypass around the condenser is not functioning properly Valve controlling refrigerant flow to the condenser is not functioning properly Modulating valves are not calibrated properly Unit control software indicates a Humidi-MiZer Reheat Mode, but the 3-way valve is not functioning properly Unit is not sized to meet the load at the current entering air and outdoor conditions. TemperaturesAIR.TOAT Outside Air Temperature 30 minutes TemperaturesAIR.TRAT Return Air Temperature 3 minutes TemperaturesAIR.TSPT Space Temperature 3 minutes InputsRSETSP.RS Static Pressure Reset 30 minutes InputsREL.HOA.RH Outside Air Relative Humidity 30 minutes InputsAIR.QOAQ Outside Air Quality 30 minutes 93 Check the unit supply air set point for cooling operation. This is the temperature that the valves will modulate to meet during a dehumidification mode. See "Thermistor Troubleshooting" on page 91 Check if SAT thermistor is in a location that is measuring stratified air See "Modulating Valves Not Functioning Properly" See "Modulating Valves Not Functioning Properly" See "Modulating Valves Not Functioning Properly" See "3-Way Valve Malfunction" Check product data tables or ECAT for rated capacity at current entering air and outdoor conditions. Valve controlling gas bypass around See "Modulating Valves Not Functioning Properly" the condenser is stuck in an open position or leaking Valve controlling refrigerant flow to the See "Modulating Valves Not Functioning Properly" condenser is stuck in a position less than 100% open General cooling mode problem See "Cooling Troubleshooting," Table 71. Faulty wire connections Check that the valve wiring is properly connected from the valve, entering the control box and at the EXV board EXV board malfunction Check alarm history for A169 (Expansion Valve Control Board Comm Failure) Valve is stuck open/closed Use Service Test to manually manipulate the valve position and confirm supply air temperature changes during operation. Run valve calibration through Service Test Check valve motor for open or short circuited windings. Shut down power to the unit and connect Ohmmeter probes across the black and white terminals. Resistance should measure 75 Ohms ±10%. Next, connect Ohmmeter probes across the red and green terminals. Resistance should measure 75 Ohms ±10%. The meter should not show an "open" or a "short" when a winding leg is measured. If either occurs, replace the valve. Valve is not calibrated properly Run valve calibration through Service Test Run Status Menu — The Run Status menu provides the user important information about the unit. The Run Status table can be used to troubleshoot problems and to help determine how and why the unit is operating. AUTO VIEW OF RUN STATUS — The Auto View of Run Status display table provides the most important unit information. The HVAC Mode (Run StatusVIEW HVAC) informs the user what HVAC mode the unit is currently in. Refer to the Modes section on page 40 for information on HVAC modes. The occupied status, unit temperatures, unit set points, and stage information can also be shown. See Table 82. Run StatusVIEWHVAC — Displays the current HVAC Mode(s) by name. HVAC Modes include: OFF VENT HIGH HEAT STARTING UP HIGH COOL FIRE SHUT DOWN SHUTTING DOWN LOW COOL PRESSURIZATION DISABLED UNOCC FREE COOL EVACUATION SOFTSTOP REQUEST TEMPERING HICOOL SMOKE PURGE REM SW DISABLE TEMPERING LOCOOLDEHUMIDIFICATION COMP STUCK ON TEMPERING VENT RE-HEAT TEST LOW HEAT Run StatusVIEWOCC — Displays the current occupancy status of the control. Run StatusVIEWMAT — Displays the current value for mixed-air temperature. This value is calculated based on return-air and outside-air temperatures and economizer damper position.
Page 1 and 2:
Controls, Start-Up, Operation, Serv
Page 3 and 4:
WARNING What to do if you smell gas
Page 5 and 6:
and the ENTER keys until the desire
Page 7 and 8:
START-UP IMPORTANT: Do not attempt
Page 9 and 10:
Table 4 — Fan Performance — 48P
Page 11 and 12:
Page 13 and 14:
Page 15 and 16:
AIRFLOW (cfm) Table 10 — Fan Perf
Page 17 and 18:
Page 19 and 20:
Page 21 and 22:
Page 23 and 24:
AIRFLOW (Cfm) LEGEND Table 18 — F
Page 25 and 26:
Page 27 and 28:
Page 29 and 30:
AIRFLOW (cfm) LEGEND Bhp — Brake
Page 31 and 32:
HIGH-EFFICIENCY MOTORS Nominal Maxi
Page 33 and 34:
2. Under the Setpoints menu, set th
Page 35 and 36:
would use Period 2 and set days Sat
Page 37 and 38:
there is a loss of communication be
Page 39 and 40:
and when ON, the control sets a cap
Page 41 and 42: System Mode Test — When the syste
Page 43 and 44: Table 31 — Unit Configuration ITE
Page 45 and 46: SETTING UP THE SYSTEM Machine Contr
Page 47 and 48: High SST Alert Delay Time (H.SST)
Page 49 and 50: Table 36 — Cool/Heat Set Point Of
Page 51 and 52: Table 38 — Run Status Cool Displa
Page 53 and 54: To use Demand Limiting, select the
Page 55 and 56: Size 050, 055, 060 Contactor OFM(s)
Page 57 and 58: Whenever the outdoor ambient temper
Page 59 and 60: Demand Level Low Heat Off Offset (L
Page 61 and 62: Limit Switch Low Temp (SW.L.T) —
Page 63 and 64: STAGE Table 49 — IGC LED Indicato
Page 65 and 66: Table 50 — Static Pressure Contro
Page 67 and 68: Table 53 — Dirty Filter Switch Po
Page 69 and 70: NOTE: If the user wishes to disable
Page 71 and 72: the economizer modulates when attem
Page 73 and 74: P = K * BP.P * (error) I = K * BP.I
Page 75 and 76: its smoke. Closing the economizer (
Page 77 and 78: Table 57 — Indoor Air Quality Con
Page 79 and 80: Table 58 — Humidity Configuration
Page 81 and 82: The default sensor is the return ai
Page 83 and 84: TEMPERATURE COMPENSATED START LOGIC
Page 85 and 86: Sensor Trim Configuration — The T
Page 87 and 88: SUPPLY FAN VFD CONFIGURATION — Th
Page 89 and 90: REMOTE SWITCH LOGIC CONFIGURATION (
Page 91: Alarms and Alarm History for for an
Page 95 and 96: Table 75 — 10K Thermistor vs Resi
Page 97 and 98: TEMP RESISTANCE (F) (Ohms) -25 98,0
Page 99 and 100: PRESSURE (PSIG) Table 80 — Suctio
Page 101 and 102: Table 81 — Discharge Pressure Tra
Page 103 and 104: Table 82 — Auto View of Run Statu
Page 105 and 106: Table 84 — Cooling Information Di
Page 107 and 108: equalize compressor oil levels. If
Page 109 and 110: Table 91 — Alert and Alarm Codes
Page 111 and 112: T072 (Evaporator Discharge Reset Se
Page 113 and 114: This alarm will disable mechanical
Page 115 and 116: This is the reverse of the Pressuri
Page 117 and 118: 117 a48-8408 Fig. 19 — Typical Po
Page 119 and 120: OD ENTHALPY SWITCH LOW REMOTE OCCUP
Page 121 and 122: Fig. 23 — Typical Electric Heat U
Page 123 and 124: 123 Fig. 25 — Typical Gas Heat Se
Page 125 and 126: 125 Fig. 27 — Component Arrangeme
Page 127 and 128: ACCSY — Accessory ACC’Y — Acc
Page 129 and 130: Table 93 — Rooftop Control Board
Page 131 and 132: Table 96 — Control Expansion Modu
Page 133 and 134: LEGEND IAQ — Indoor Air Quality V
Page 135 and 136: the motor position to be configured
Page 137 and 138: TIME EWT LWT SETP Run Status Servic
Page 139 and 140: Fig. 37 — Door Latch Fig. 38 —
Page 141 and 142: SUPPLY FAN AND POWER EXHAUST MOTOR
Page 143 and 144:
Routine cleaning of coil surfaces i
Page 145 and 146:
Saturated Discharge Temperature (de
Page 147 and 148:
Page 149 and 150:
Page 151 and 152:
Page 153 and 154:
Page 155 and 156:
Page 157 and 158:
Page 159 and 160:
Page 161 and 162:
Page 163 and 164:
Gas System Adjustment (48P Only) GA
Page 165 and 166:
APPENDIX A — LOCAL DISPLAY TABLES
Page 167 and 168:
Page 169 and 170:
Page 171 and 172:
Page 173 and 174:
Page 175 and 176:
Page 177 and 178:
APPENDIX B — CCN TABLES (cont) ST
Page 179 and 180:
APPENDIX B — CCN TABLES (cont) ST
Page 181 and 182:
APPENDIX B — CCN TABLES (cont) SE
Page 183 and 184:
Page 185 and 186:
Page 187 and 188:
APPENDIX B — CCN TABLES (cont) MA
Page 189 and 190:
APPENDIX B — CCN TABLES (cont) MA
Page 191 and 192:
TESTACTC TESTCOOL TESTFANS TESTHEAT
Page 193 and 194:
APPENDIX C — UNIT STAGING TABLES
Page 195 and 196:
* 41 for Supply Fan Motor VFD, 42 f
Page 197 and 198:
Fig. B — VFD Keypad START UP WITH
Page 199 and 200:
Upload All Parameters — To upload
Page 201 and 202:
To replace the main fan for frame s
Page 203 and 204:
ALARM CODE ALARM NAME IN PANEL 2001
Page 205 and 206:
APPENDIX E — MODE SELECTION PROCE
Page 207 and 208:
CONTROLS SET POINT AND CONFIGURATIO
Page 209 and 210:
Page 211 and 212:
Page 213 and 214:
show all

Controls, Start-Up, Operation, Service and ... - Climayoreo

Create successful ePaper yourself

Delete template?

Save as template?