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MP-3000a Controller
77
LED
Display
(Test No.)
LCD Display
(Shows Approx.
Amps for 460V,
60 Hz Unit)
Test Description
Possible
Alarms
Duration
(Time)
Pb.13
Capacity Test 3
Activated
10.2A 10.1A
10.2A
KVQ valve is almost closed (set to -3 C). With
condenser fan ON, compressor ON and evaporator
fans on high speed; alarm is recorded if temperature
difference exceeds:
• CRR40: 1.5 C (2.7 F)
• CRR20: 3.0 (5.4 F)
• CRR40SL: 3.0 C (5.4 F)
24
4 Minutes
(5 Minutes
on CRR20)
Pb.14
Heat Test
Activated
7.9A 7.9A 7.9A
With heaters ON and evaporator fans on high speed,
alarm is recorded if supply temperature is not at least
0.4 C (0.7F) above the return air temperature.
27
4 Minutes
Pb.15
Evaporator
Temperature
Test Activated
KVQ valve is fully opened. With condenser fan ON and
compressor ON, evaporator fans are turned OFF. The
evaporator coil temperature must decrease to approx.
-15 C 9+5 F), depending on the return air temperature.
25
5 minutes
Maximum
Pb.15
Evaporator
Temperature
Test Activated
3.2A 3.1A 3.2A
“PT1 Part 1 End” is recorded in PTI log. Return/supply
air temperature difference from tests P1.11, P1.12,
P1.13 and P1.14 are recorded in PTI log. Condenser
fan and compressor stop. Evaporator fans start and
operate on high speed.
None
5 Minutes
Pb.15
Evaporator
Temperature
Test Activated
7.9A 7.9A 7.9A
If return air temperature is below 5C (41F), evaporator
fans operate on high speed and heaters turn ON. Unit
operates until return air temperature is above 5C (41F).
None
120
Minutes
Maximum
Return
Temp.
PTI PASS: Press
(any) Key
If alarms (errors) occurred during PTI test, LCD display
shows PTI FAIL. Press any key to clear display.
Unit will remain OFF unit any key is pressed again.
None
-
CRR Brief PreTrip (PTI Test Procedure)
Summary of Contents for CRR-40 119
Page 4: ......
Page 16: ...Safety Precautions 16...
Page 18: ...Service Guide 18...
Page 20: ...Model Features 20...
Page 32: ...Specifications 32...
Page 120: ...MP 3000a Controller 120...
Page 160: ...Wiring and Schematic Diagrams Index 160...
Page 161: ...161 MPC2000 Wiring Schematic...
Page 162: ...162 MPC2000 High Voltage Wiring Diagram...
Page 163: ...163 MPC2000 Low Voltage Wiring Diagram...
Page 164: ...164 MPC2000 WCC Wiring Schematic...