Thermo King CRR-40 119, Руководство пользователя

Страница: 76 / 170

MP-3000a Controller
76
LED
Display
(Test No.)
LCD Display
(Shows Approx.
Amps for 460V,
60 Hz Unit)
Test Description Possible
Alarms
Duration
(Time)
Pb.07 Reverse Phase
Activated
Condenser fan stops. Reverse phase selector relay is
energized and condenser motor is started in reverse
for 2 seconds. Amp draw difference between correct
and wrong motor rotation must be less than 0.2 amps. 58 30 Seconds
Pb.08 Compressor
Activated
9.2A 9.1A 9.2A
With KVQ valve fully opened, condenser fan and
compressor are turned ON. Amp draw is measured
and compared to voltage. Evaporator temperature
condenser coil temperature are measured and
recorded in PTI log.
If compressor has been OFF for last 18 hours (less
than 30 seconds ON), a compressor sequence start
occurs.
06, 07 14 Seconds
Pb.09 Compressor
High Pressure
Activated
15.2A 15.0A
15.2A
KVQ valve is fully opened. With compressor ON,
evaporator fan operates on high speed until high
pressure cutout occurs, causing significant amps drop.
Maximum time depends on condenser coil temperature
at start of test. 53 10 to 300
seconds
Pb.09 Compressor
High Pressure
Activated
4.5A 4.4A 4.5A
With condenser fan off, compressor fan starts and
operates. Compressor stops. Condenser fan operates
60 seconds more to lower condenser temperature. 54 60 Seconds
plus 10
Seconds
Pb.10 Evaporator Fan
Low Activated
1.1A 1.0A 1.1A
Condenser fan and compressor are turned OFF. With
evaporator fan on low speed, Amp draw is measured
and compared to voltage and frequency:
• CRR40:
1.0 Amps approx. at 50 Hz.,
1.0 Amps approx. at 60 Hz.
14, 15 10 Seconds
Pb.11 Capacity Test 1
Activated
13.1A 13.0A
13.1A
If return air sensor is above 20 C 968 F), unit precools
return air temperature to 15 C (59 F). KVQ valve is fully
open, condenser fan ON, compressor ON, and
evaporator fans are on low speed.
A difference of approx. 3.5 C (5.4 F) is required
between return and supply air temperatures,
depending on return air and condenser coil
temperatures.
22 3 Minutes
(4 Minutes
on CRR20)
Precool if
Required
Pb.12 Capacity Test 2
Activated
15.2A 15.0A
15.2A
With condenser fan ON, compressor ON and KVQ
valve fully open, evaporator fans are changed to high
speed. A difference of approx. 3.0 C (5.4 F) is required
between return and supply air temperatures,
depending on return air and condenser coil
temperatures. However, temperature difference must
be less than in test P1.11 23 2 Minutes
CRR Brief PreTrip (PTI Test Procedure)