Temperature Resistance Chart Table - Pentair UltraTemp User Manual

42
Problem or Symptoms
Higher than Normal Head Pressure, lower than
normal suction pressure with high superheat
and very cold or frosty distributor tubes, may
have no Alarm.
Lower than Normal Head Pressure, higher
than normal suction pressure with cold suction
line and compressor and no superheat, may
have no Alarm.
Unusually higher than normal current.
Low current with high superheat.
Unit runs, but trips continously.
Problems and Corrective Action (3 Phase Units Only)
Problem or Symptoms
Unable to turn Heat Pump ON. Display is
Blank. Unit will NOT start.
Compressor making a loud or unusual noise or
sounds during operation. Fan is turning, no
cool air discharge out of top of heater. Unit
ON, and Set Temperature is above Actual, but
Unit is not heating.
°F OHMS °F
0 85,387 51
10 62,479 52
20 46,225 53
30 34,561 54
40 26,100 55
41 25,391 56
42 24,704 57
43 24,037 58
44 23,391 59
45 22,764 60
46 22,156 61
47 21,566 62
48 20,993 63
49 20,438 64
50 19,900 65
NOTE: Any service must be done by an authorized service agency person.
Installation and User's Guide
Possible Cause
TXV stuck closed.
TXV stuck open.
TXV stuck closed/partially closed, insufficient water
flow, system overcharged.
Unit undercharged.
Wires not connected properly.
Possible Cause
Incorrect Wiring.
Faulty Phase Monitor.
Loose wire on Phase Monitor, either from the supply
input power or the output side.
Compressor running Backwards. This usually
happens if the compressor wire harness is
disconnected for possible repaire or replacement.
* Temperature Resistance Chart
OHMS °F OHMS
19,377 66 13,136
18,870 67 12,809
18,377 68 12,491
17,899 69 12,182
17,435 70 11,882
16,985 71 11,589
16,548 72 11,305
16,123 73 11,029
15,711 74 10,761
15,310 75 10,500
14,921 76 10,246
14,543 77 9,999
14,176 78 9,758
13,820 79 9,525
13,473 80 9,297
Corrective Action
1. Disconnect TXV bulb from suction line (SL), have it in your hand, if
pressures go back to normal, then reinstall the bulb on suction line (it
may have some debris stuck in the port). For adjustable TXVs open
adjustable valve, it may remove the debris and set it back to original
position.
2. If (1) does not work, recover the charge, remove bulb from SL,
unscrew TXV head, shake it, if rattles, replace head
(PN KT-45-ZGA), if not, replace TXV and filter dryer and charge
appropriately.
1. Check to see if TXV bulb is firmly attached to suction line, if loose,
attach firmly by tightening the clamp over the bulb and suction line.
2. If (1) above does not work, reclaim charge and replace TXV and
filter dryer with nameplate charge.
See Possible Cause column for: TXV stuck closed, Insufficient
water flow, and Unit overcharged.
Find source of refrigerant leak and fix. Pull vacuum and charge.
Fix the miswire as per the Wiring Diagrams.
Corrective Action
Check the Light on Phase Monitor inside the electrical box. If red,
switch two of the Input wires. Any two of the three can be switched.
Call dealer or factory for advice before attempting to replace parts.
Replace Phase Monitor.
Check the Light on Phase Monitor inside the electrical box. If the Light
is Red, fix the supply power loose end. If the Light is Green, fix the
output loose wire.
Switch any two of the three wires on the compressor side of the
Contactor.
°F OHMS °F
81 9,076 96
82 8,861 97
83 8,651 98
84 8,447 99
85 8,249 100
86 8,056 101
87 7,867 102
88 7,684 103
89 7,506 104
90 7,333 105
91 7,164 106
92 6,999 107
93 6,839 108
94 6,683 110
95 6,530 120
OHMS
6,382
6,238
6,097
5,960
5,827
5,697
5,570
5,446
5,326
5,208
5,094
4,982
4,873
4,664
3,758