FBD FBD563 - 13.23 High Head;Suction Pressure.

(Item 13.22 continued from previous page.)
D. Base refrigeration settings. D. Load all Defaults to ensure factory
settings.
E. Hot gas valve is stuck open, E. Recover refrigerant and remove
or debris is preventing valve blockage or replace valve, if
from closing. necessary. Recharge system with
R404-A, using the specifications
label on the backside of the
machine.
F. Expansion valve not opening. F. 1. Test expansion valve coil to
ensure it is receiving 24VAC.
Replace expansion valve if
plunger inside doesn’t move.
Contact FBD Warranty
Dept. before tapping system
if unit is under warranty!
Recover refrigerant and replace
valve. Recharge system with
R404-A, using the
specifications label on the
backside of the machine.
2. Test relay board for 24VAC
output and 5VDC relay coil
input. Replace, if necessary.
G. Expansion valve restriction. G. Contact FBD Warranty Dept.
before tapping system if unit is
under warranty! Recover
refrigerant and remove blockage
or replace valve, if necessary.
Recharge system with R404-A,
using the specifications label on
the backside of the machine.
H. Refrigeration leak or low H. Contact FBD Warranty Dept.
refrigerant charge. before tapping system if unit is
under warranty! Put gages on
system and check pressures.
Single side suction should be
32-35 psig, dual side 42-45 psig.
Single and dual side discharge
should be 275-300 psig. Check for
and repair leaks, recharge system
with R404-A, using the
specifications label on the
backside of the machine.
I. Water is not turned on for I. Ensure water is turned on for the
water condenser inlet. water condenser inlet.
CAUTION
DO NOT PRESSURIZE LOW SIDE (EVAPORATOR AND COMPRESSOR SUCTION) ABOVE 150 psig
FOR ANY REASON! COMPONENTS WILL FAIL AND WARRANTIES WILL BE VOID.
13.23 High head/suction A. Condensor air flow restricted. A. Check for air flow restriction, clean
pressure. condensor and air filter.
B. Compressor damage B. Check amp draw on compressor.
C. High ambient temperature. C. Temperature surrounding unit
should be less than 90°F.
D. Water is not turned on for D. Ensure water is turned on for the
water condenser inlet. water condenser inlet.
33
TROUBLE CAUSE REMEDY
NOTE: Contact FBD Customer Service
for questions concerning compressors
and operational issues.
NOTE: Contact FBD Customer Service at
866-323-2777 for questions concerning
compressors and operational issues.
Contact FBD Warranty Dept. at 866-323-2777 before tapping system if unit is under warranty!