Stulz Compact CW Series - Troubleshooting Capacity and Heaters; Troubleshooting Humidifier Issues

(© Oct, 2007)
Compact CW Series Installation, Operation & Maintenance Manual
A
ir Technology Systems, Inc.
4-3
SYMPTOM PROBABLE CAUSE RECOMMENDATION
System Short of Capacity a. Low Chilled Water flow Check for leaks. Repair and recharge
system.
b. Supply water temperature too high Check chilled water supply
c. Reduced airflow Check filters
d. Dirty Coil Clear coil fins of debris
Electric Heater a. Circuit breaker tripped Check for short circuit, reset circuit
Inoperable breaker
b. Temperature setpoint too low Increase temperature setpoint
c. Overheat switch open Insufficient air flow across heater
elements. Check for dirty filters or
obstructions that may reduce air flow.
Correct or replace as needed.
d. Manual reset overheat safety Reset manual overheat safety switch
switch tripped (see item immediately above).
e. Heater element burned out Check continuity with an ohmmeter
Replace heater element
Hot Water Heater a. Low hot water flow Check hot water flow at supply source
Inoperable Inspect piping for leaks or obstructions
b. Low hot water supply temperature Check hot water supply
c. Temperature setpoint too low Increase temperature setpoint
d. Control power interrupted Check for loose or broken wires
Humidifier Inoperable a. Water supply has been turned Connect and/or turn on water supply
Note: See Humidifier off or not connected
Manual for Additional Help
b. Humidifier switch is in “Off” position Turn switch to “Auto/On” position
c. Electrical connections are loose Tighten electrical connections
d. Humidifier circuit breaker tripped Check for over current by the humidifier
electrodes. Drain water from tank and
refill. Reset circuit breaker.
e. Relative humidity is above setpoint. Adjust humidity setpoint
f. Electrode canister change cylinder 1. Consult humidifier manual
light is on
2. Water conductivity is too low and
water is at the top of the cylinder,
(see next item).
g. Water conductivity is too low Add a teaspoon of table salt to the water
through the top of the cylinder. Typically
only required on initial start-up.