Carrier 26H - Manual (Page 56)

26H S E R V I C E Carrier
OBSERVATION POSSIBLE CAUSE REMEDY AND REFERENCE SECTIONS
8. Long Freezing Cycle
(30 - 40 min. normal)
Siphon standpipe is poorly
seated, allowing cold water
to escape
Check water pan standpipe for
proper seating Installation
16
Float valve leaking making
siphon during freezing
period.
Check water pressure. If over 60
psig use a pressure reducing
valve and replace if necessary Installation
12 & 16
9. Long Defrost Cycle
(Normal 5 to 8 Minutes)
Main control set incorrectly
("cut-in"temperature too
high)
Lower "cut-in"setting 28
Low-refrigerant charge Check charge and correct if
necessary 4
Low head pressure during
the freezing cycle
Should be 125 psi. Adjust
water regulating valve 5 & 13
Bulged freezing columns Replace evaporator,' check main
control
10
Solenoid valve stuck shut
or only partly open (listen
for hissing) Check solenoid and wiring 32
Leaky water regulating
valve Check and replace i f necessary 13
Water condenser scaled up Clean condenser with inhibited
acid 9
10. During harvest cycle unit
switches back to freezing
then again to defrost
Defective interlock in main
control Replace 28
Cut-in Bulb loose on suet,
line Tighten clamps 28
11. Continuous running - no
ice formed.
No make up water reaching
water pan
*
Check for stuck float valve or
plugged nozzle 11
Loss of refrigerant Check refrigerant charge; elim­
inate any leaks, add refrigerant 4
Moisture in system Change dryer 8
Solenoid valve stuck open Check for grounded solenoid.
Replace if necessary 32
Float setting too high
causing standpipe to
siphon Reset float valve. Seat water pan
standpipe Installation
16
Service 11
i
t
26H-57PD 56